odd uv-unwrap issue

wanted to get some help regarding this issue as I don't really see any particular posts regarding this issue in question. what is happening is, I load a model, and I attempt to generate UVmaps but some generate others don't. not sure why. i checked 2019.4.17f1 and it doesnt do this, however in 2020.3.1f1 it does this. I even went as far and redo the model and reuvmap it again in maya and same out come. thoughts? here is the image in question of my error. not sure what I can do to fix this. Seems to show on the bug tracker, is this something I need to wait to get fixed? or is there a way to fix it or adjust it so it doesn't do this. thanks for any assistance.

 

so no one is going to let me know what the issue could be?

 

here is the error it spits out.

Manager::Import
0x00007ff6d732d3b8 (Unity) ImportAndPostprocessOutOfDateAssets
0x00007ff6d7337bcb (Unity) RefreshInternalV2
0x00007ff6d733ef86 (Unity) StopAssetImportingV2
0x00007ff6d72a0b46 (Unity) AssetDatabase::StopAssetImporting
0x00007ff6d7998726 (Unity) AssetDatabase_CUSTOM_StopAssetEditing
0x0000026ad25bf4c1 (Mono JIT Code) (wrapper managed-to-native) UnityEditor.AssetDatabase:StopAssetEditing ()
0x0000026ad25beecb (Mono JIT Code) UnityEditor.AssetImporters.AssetImporterEditor:ImportAssets (System.Collections.Generic.IEnumerable`1<string>)
0x0000026ad25be56b (Mono JIT Code) UnityEditor.AssetImporters.AssetImporterEditor:ApplyAndImport ()
0x0000026ad253d11b (Mono JIT Code) UnityEditor.AssetImporters.AssetImporterEditor:ApplyButton ()
0x0000026ad253cb3b (Mono JIT Code) UnityEditor.AssetImporters.AssetImporterEditor:OnApplyRevertGUI ()
0x0000026ad253c46f (Mono JIT Code) UnityEditor.AssetImporters.AssetImporterEditor:ApplyRevertGUI ()
0x0000026ad253333b (Mono JIT Code) UnityEditor.AssetImporterTabbedEditor:OnInspectorGUI ()
0x0000026ad2532d23 (Mono JIT Code) UnityEditor.ModelImporterEditor:OnInspectorGUI ()
0x0000026acce4db1c (Mono JIT Code) UnityEditor.UIElements.InspectorElement/<>c__DisplayClass59_0:<CreateIMGUIInspectorFromEditor>b__0 ()
0x00000269c7d980f0 (Mono JIT Code) UnityEngine.UIElements.IMGUIContaineroOnGUI (UnityEngine.Event,UnityEngine.Matrix4x4,UnityEngine.Rect,bool,UnityEngine.Rect,System.Action,bool)
0x00000269c7d9723b (Mono JIT Code) UnityEngine.UIElements.IMGUIContainer:HandleIMGUIEvent (UnityEngine.Event,UnityEngine.Matrix4x4,UnityEngine.Rect,System.Action,bool)
0x00000269c86d263b (Mono JIT Code) UnityEngine.UIElements.IMGUIContainer:HandleIMGUIEvent (UnityEngine.Event,System.Action,bool)
0x00000269c86d24c3 (Mono JIT Code) UnityEngine.UIElements.IMGUIContainer:HandleIMGUIEvent (UnityEngine.Event,bool)
0x00000269c86d210b (Mono JIT Code) UnityEngine.UIElements.IMGUIContainer:SendEventToIMGUIRaw (UnityEngine.UIElements.EventBase,bool,bool)
0x00000269c86d2003 (Mono JIT Code) UnityEngine.UIElements.IMGUIContainer:SendEventToIMGUI (UnityEngine.UIElements.EventBase,bool,bool)
0x00000269c7ad0fdb (Mono JIT Code) UnityEngine.UIElements.IMGUIContainer:HandleEvent (UnityEngine.UIElements.EventBase)
0x00000269c7abebd8 (Mono JIT Code) UnityEngine.UIElements.CallbackEventHandler:HandleEventAtTargetPhase (UnityEngine.UIElements.EventBase)
0x00000269c86cf62b (Mono JIT Code) UnityEngine.UIElements.MouseCaptureDispatchingStrategyispatchEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel)
0x00000269c7abd0ee (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:ApplyDispatchingStrategies (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel,bool)
0x00000269c7abcc83 (Mono JIT Code) UnityEngine.UIElements.EventDispatcherrocessEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel)
0x00000269c7ac1593 (Mono JIT Code) UnityEngine.UIElements.EventDispatcherrocessEventQueue ()
0x00000269c7a9ff83 (Mono JIT Code) UnityEngine.UIElements.EventDispatcher:OpenGate ()
0x00000269c7abff7b (Mono JIT Code) UnityEngine.UIElements.EventDispatcherGateispose ()
0x00000269c7abcf13 (Mono JIT Code) UnityEngine.UIElements.EventDispatcherrocessEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel)
0x00000269c7abc743 (Mono JIT Code) UnityEngine.UIElements.EventDispatcherispatch (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.IPanel,UnityEngine.UIElements.DispatchMode)
0x00000269c7abc5db (Mono JIT Code) UnityEngine.UIElements.BaseVisualElementPanel:SendEvent (UnityEngine.UIElements.EventBase,UnityEngine.UIElements.DispatchMode)
0x00000269c7d5c50b (Mono JIT Code) UnityEngine.UIElements.UIElementsUtilityoDispatch (UnityEngine.UIElements.BaseVisualElementPanel)
0x00000269c7d5bfeb (Mono JIT Code) UnityEngine.UIElements.UIElementsUtility:UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (int,intptr,bool&)
0x00000269c7d5bdef (Mono JIT Code) UnityEngine.UIElements.UIEventRegistrationrocessEvent (int,intptr)
0x00000269c7d5bd2b (Mono JIT Code) UnityEngine.UIElements.UIEventRegistration/<>c:<.cctor>b__1_2 (int,intptr)
0x00000269c7d5bb8d (Mono JIT Code) UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&)
0x00000269c7d5bc3e (Mono JIT Code) (wrapper runtime-invoke) <Module>:runtime_invoke_void_int_intptr_intptr& (object,intptr,intptr,intptr)
0x00007ff9b7f4e480 (mono-2.0-bdwgc) [mini-runtime.c:2812] mono_jit_runtime_invoke
0x00007ff9b7ed2902 (mono-2.0-bdwgc) [object.c:2921] do_runtime_invoke
0x00007ff9b7edb95f (mono-2.0-bdwgc) [object.c:2968] mono_runtime_invoke
0x00007ff6d5b5aa34 (Unity) scripting_method_invoke
0x00007ff6d5b533b5 (Unity) ScriptingInvocation::Invoke
0x00007ff6d5b4c2b5 (Unity) ScriptingInvocation::Invoke<void>
0x00007ff6d4216e6d (Unity) Scripting::UnityEngine::GUIUtilityProxy:rocessEvent
0x00007ff6d6777826 (Unity) GUIView:rocessRetainedMode
0x00007ff6d71fbf5e (Unity) GUIView::OnInputEvent
0x00007ff6d6777718 (Unity) GUIView:rocessInputEvent
0x00007ff6d71fd3fb (Unity) GUIView:rocessEventMessages
0x00007ff6d71f4a30 (Unity) GUIView::GUIViewWndProc
0x00007ffa4786e858 (USER32) CallWindowProcW
0x00007ffa4786e299 (USER32) DispatchMessageW
0x00007ff6d71c3a66 (Unity) MainMessageLoop
0x00007ff6d71c7bf1 (Unity) WinMain
0x00007ff6d903e0d6 (Unity) __scrt_common_main_seh
0x00007ffa47417034 (KERNEL32) BaseThreadInitThunk
0x00007ffa48722651 (ntdll) RtlUserThreadStart

 

You're going to want to report this to Unity using the Help > Report a Bug ... menu option in the editor. Not to much anyone here can do to help with internal Unity code crashing.

 

gotcha will do.