Bug Crash Register in PurchaseProcessingResult ProcessPurchase ( PurchaseEventArgs args )

A crash is registered on Firebase Crashlytics, but not experiencing any crash on device.
or crash registered whenever i quit the game.
Note: This game version: 36.4 (53) is in testing phase.
I attached the script IAPPurchaseManager i am using for my In-Apps. Used this script as a singleton.

# Crashlytics - Stack trace
# Application: com.ogs.off.road.semi.cargo.truck.driver.simulator.legends.cpec2
# Platform: android
# Version: 36.4 (53)
# Issue: 0eeb39409010ad8c4169ff7ee601fd1f
# Session: 64634DBE03B00001794C27511AB2B5DA_DNE_0_v2
# Date: Tue May 16 2023 14:34:29 GMT+0500 (Pakistan Standard Time)

Fatal Exception: java.lang.Exception: NullReferenceException : Object reference not set to an instance of an object.
at IAPPurchaserManager.ProcessPurchase(IAPPurchaserManager)
at UnityEngine.Purchasing.PurchasingManager.ProcessPurchaseIfNew(UnityEngine.Purchasing.PurchasingManager)
at UnityEngine.Purchasing.PurchasingManager.ProcessPurchaseOnStart(UnityEngine.Purchasing.PurchasingManager)
at UnityEngine.Purchasing.PurchasingManager.OnProductsRetrieved(UnityEngine.Purchasing.PurchasingManager)
at UnityEngine.Purchasing.Extension.UnityUtil.Update(UnityEngine.Purchasing.Extension.UnityUtil)

pool-7-thread-1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

FinalizerWatchdogDaemon:
at java.lang.Thread.sleep(Thread.java)
at java.lang.Thread.sleep(Thread.java:450)
at java.lang.Thread.sleep(Thread.java:355)
at java.lang.Daemons$FinalizerWatchdogDaemon.sleepForNanos(Daemons.java:438)
at java.lang.Daemons$FinalizerWatchdogDaemon.waitForProgress(Daemons.java:480)
at java.lang.Daemons$FinalizerWatchdogDaemon.runInternal(Daemons.java:369)
at java.lang.Daemons$Daemon.run(Daemons.java:140)
at java.lang.Thread.run(Thread.java:1012)

ConnectivityThread:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

PlayBillingLibrary-3:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

Okio Watchdog:
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:442)
at java.lang.Object.wait(Object.java:568)
at com.android.okhttp.okio.AsyncTimeout.awaitTimeout(AsyncTimeout.java:313)
at com.android.okhttp.okio.AsyncTimeout.access$000(AsyncTimeout.java:42)
at com.android.okhttp.okio.AsyncTimeout$Watchdog.run(AsyncTimeout.java:288)

Firebase Background Thread #2:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.concurrent.CustomThreadFactory.lambda$newThread$0$CustomThreadFactory(CustomThreadFactory.java:47)
at com.google.firebase.concurrent.-$$Lambda$CustomThreadFactory$HeQjDIAeENT2LKE3GfM7LN2rKe0.run4)
at java.lang.Thread.run(Thread.java:1012)

main:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.app.ActivityThread.main(ActivityThread.java:8302)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:556)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1037)

WM.task-2:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

WM.task-1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

GmsDynamite:
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:442)
at java.lang.Object.wait(Object.java:568)
at com.google.android.gms.dynamite.zza.run(com.google.android.gmslay-services-basement@@18.1.0:2)

Chrome_ProcessLauncherThread:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

GoogleApiHandler:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

PlayBillingLibrary-1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

31052-ScoutStateMachine:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

ReferenceQueueDaemon:
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:442)
at java.lang.Object.wait(Object.java:568)
at java.lang.Daemons$ReferenceQueueDaemon.runInternal(Daemons.java:232)
at java.lang.Daemons$Daemon.run(Daemons.java:140)
at java.lang.Thread.run(Thread.java:1012)

Firebase Background Thread #0:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.concurrent.CustomThreadFactory.lambda$newThread$0$CustomThreadFactory(CustomThreadFactory.java:47)
at com.google.firebase.concurrent.-$$Lambda$CustomThreadFactory$HeQjDIAeENT2LKE3GfM7LN2rKe0.run4)
at java.lang.Thread.run(Thread.java:1012)

Measurement Worker:
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:442)
at it.runcom.google.android.gms.dynamite_measurementdynamite@231613044@23.16.13 (190400-0):7)

CrAsyncTask #2:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java.util.concurrent.ArrayBlockingQueue.poll(ArrayBlockingQueue.java:432)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at Mj.run(chromium-TrichromeWebViewGoogle.aab-stable-561513533:8)
at java.lang.Thread.run(Thread.java:1012)

UnityChoreographer:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

PlayBillingLibrary-2:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

pool-11-thread-1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1188)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:905)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

FinalizerDaemon:
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:442)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:203)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:224)
at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:300)
at java.lang.Daemons$Daemon.run(Daemons.java:140)
at java.lang.Thread.run(Thread.java:1012)

awaitEvenIfOnMainThread task continuation executor1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.crashlytics.internal.common.ExecutorUtils$1$1.onRun(ExecutorUtils.java:67)
at com.google.firebase.crashlytics.internal.common.BackgroundPriorityRunnable.run(BackgroundPriorityRunnable.java:27)
at java.lang.Thread.run(Thread.java:1012)

AudioPortEventHandler:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

queued-work-looper:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

InsetsAnimations:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

Firebase Background Thread #3:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.concurrent.CustomThreadFactory.lambda$newThread$0$CustomThreadFactory(CustomThreadFactory.java:47)
at com.google.firebase.concurrent.-$$Lambda$CustomThreadFactory$HeQjDIAeENT2LKE3GfM7LN2rKe0.run4)
at java.lang.Thread.run(Thread.java:1012)

PlayBillingLibrary-4:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

CrAsyncTask #1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java.util.concurrent.ArrayBlockingQueue.poll(ArrayBlockingQueue.java:432)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at Mj.run(chromium-TrichromeWebViewGoogle.aab-stable-561513533:8)
at java.lang.Thread.run(Thread.java:1012)

ScionFrontendApi:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:458)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

AdWorker(Default) #1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:463)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:939)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

AdWorker(Default) #3:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:463)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:939)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

Crashlytics Exception Handler1:
at dalvik.system.VMStack.getThreadStackTrace(VMStack.java)
at java.lang.Thread.getStackTrace(Thread.java:1841)
at java.lang.Thread.getAllStackTraces(Thread.java:1909)
at com.google.firebase.crashlytics.internal.common.CrashlyticsReportDataCapture.populateThreadsList(CrashlyticsReportDataCapture.java:331)
at com.google.firebase.crashlytics.internal.common.CrashlyticsReportDataCapture.populateExecutionData(CrashlyticsReportDataCapture.java:302)
at com.google.firebase.crashlytics.internal.common.CrashlyticsReportDataCapture.populateEventApplicationData(CrashlyticsReportDataCapture.java:252)
at com.google.firebase.crashlytics.internal.common.CrashlyticsReportDataCapture.captureEventData(CrashlyticsReportDataCapture.java:106)
at com.google.firebase.crashlytics.internal.common.SessionReportingCoordinator.persistEvent(SessionReportingCoordinator.java:279)
at com.google.firebase.crashlytics.internal.common.SessionReportingCoordinator.persistFatalEvent(SessionReportingCoordinator.java:128)
at com.google.firebase.crashlytics.internal.common.CrashlyticsController$2.call(CrashlyticsController.java:212)
at com.google.firebase.crashlytics.internal.common.CrashlyticsController$2.call(CrashlyticsController.java:197)
at com.google.firebase.crashlytics.internal.common.CrashlyticsBackgroundWorker$3.then(CrashlyticsBackgroundWorker.java:105)
at com.google.android.gms.tasks.zze.run(com.google.android.gmslay-services-tasks@@18.0.2:1)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.crashlytics.internal.common.ExecutorUtils$1$1.onRun(ExecutorUtils.java:67)
at com.google.firebase.crashlytics.internal.common.BackgroundPriorityRunnable.run(BackgroundPriorityRunnable.java:27)
at java.lang.Thread.run(Thread.java:1012)

com.google.firebase.crashlytics.startup1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.crashlytics.internal.common.ExecutorUtils$1$1.onRun(ExecutorUtils.java:67)
at com.google.firebase.crashlytics.internal.common.BackgroundPriorityRunnable.run(BackgroundPriorityRunnable.java:27)
at java.lang.Thread.run(Thread.java:1012)

PlayBillingLibrary-5:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

AdWorker(Default) #2:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:463)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:939)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

OkHttp ConnectionPool:
at java.lang.Object.wait(Object.java)
at com.android.okhttp.ConnectionPool$1.run(ConnectionPool.java:106)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

GoogleApiHandler:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

CleanupReference:
at java.lang.Object.wait(Object.java)
at java.lang.Object.wait(Object.java:442)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:203)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:224)
at ck.run(chromium-TrichromeWebViewGoogle.aab-stable-561513533:3)

AdWorker(NG) #1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1188)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:905)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)

PlatformServiceBridgeHandlerThread:
at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
at android.os.MessageQueue.next(MessageQueue.java:337)
at android.os.Looper.loopOnce(Looper.java:168)
at android.os.Looper.loop(Looper.java:299)
at android.os.HandlerThread.run(HandlerThread.java:67)

Firebase Background Thread #1:
at jdk.internal.misc.Unsafe.park(Unsafe.java)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1063)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at com.google.firebase.concurrent.CustomThreadFactory.lambda$newThread$0$CustomThreadFactory(CustomThreadFactory.java:47)
at com.google.firebase.concurrent.-$$Lambda$CustomThreadFactory$HeQjDIAeENT2LKE3GfM7LN2rKe0.run4)
at java.lang.Thread.run(Thread.java:1012)

 

Scenes Order
1- PrivacyScene
2- GameManagersLoadingScene (where i initialize my Singletons, Managers etc. IAPPurchaserManager.cs also initialized here)
3- MainScene ( Here player is buying InApps, also contain MainUI.cs script)

Now issue is that IAPPurchaserManager.ProcessPurchase(), is auto called internally by unity in-app handling code (I confirmed this).
But as we know,

public PurchaseProcessingResult ProcessPurchase ( PurchaseEventArgs args )
{
return PurchaseProcessingResult.Complete;
}
only called when specific In-App is initiated, and that In-App result is completed.

On safer side i already put check on obj.of MainUI

MainUI mainui = (MainUI)FindObjectOfType(typeof(MainUI));
if(mainui != null)
{
}

can you confirm that PurchaseProcessingResult ProcessPurchase called internally by unity In-App purchase handling side? just want to know that. Because i confirmed that its calling automatically in my GameManagersLoadingScene.

Note: This game version: 36.4 (53) is in testing phase. (Bug occurs in this build)
game version 36.3 (52) is live.

 

Understood. Thanks for helping.