Game is blocked if we hide it after ads start

Unity ads version 3.7.1. In test mode.
When we press ads button and immediatly hide game(so device is locked). Unlocked it and return to game we see black screen and can't exit from it, ads not showing.

When we pressed button we get logs that the advertisement is being opened:

Code (CSharp):

1. com.unity3d.services.ads.UnityAdsImplementation.show() (line:241) :: Unity Ads opening new ad unit for placement buySoft
2. com.unity3d.services.core.api.Sdk.logInfo() (line:84) :: Opening performance ad unit with orientation PORTRAIT, hardware acceleration enabled

We we unblock device and return to game, we not received any callback(OnApplicationPause, UnityAds) and have black ads screen(we can't exit from it):


If we wait until ads appear and only then hide the application we get same logcat logs. Except when we return we start getting other unity ads log and all works:

Code (CSharp):

1. com.unity3d.services.core.api.Sdk.logInfo() (line:84) :: Requesting ad plan from...
2. com.unity3d.services.core.api.Sdk.logInfo() (line:84) :: AdPlan received with 1 campaigns and refreshDelay 0
3. com.unity3d.services.core.api.Sdk.logInfo() (line:84) :: Unity Ads event: sending start event to...
4. com.unity3d.services.core.api.Sdk.logInfo() (line:84) :: Unity Ads event: sending first_quartile event to

We also get spamming error:

Code (CSharp):

1. Info chromium [INFO:CONSOLE(390)] "Uncaught (in promise) ACCELEROMETER_DATA_NOT_AVAILABLE", source: file:///storage/emulated/0/Android/data/com.sdfadsfasf/cache/UnityAdsCache/UnityAdsWebApp.html?platform=android&origin=https%3A%2F%2Fwebview.unityads.unity3d.com%2Fwebview%2F3.7.0%2F150de2222dbb31824b390e22a88e78b6028b3f22%2Frelease%2Findex.html&version=150de2222dbb31824b390e22a88e78b6028b3f22 (390)
2. Debug WebView evaluateJavascript=javascript:window.nativebridge.handleCallback([["358","ERROR",["ACCELEROMETER_DATA_NOT_AVAILABLE"]]]);

But it exist in both cases, so it should not be a problem.

 

Unity 2020.2.5f1