Crash on UObject::ProcessEvent after 4.7 update

Crash Report
[Link Removed]
Bugg 38910

After updating project from 4.6.1 to 4.7, user experiences unexplained crash when playing in editor.

*In addtion to the crash report, the user provides a lot of additional information and screenshots on the forum post listed in "additional URL."

Do not have project files to reproduce locally.

<unknown module>! KERNELBASE!RaiseException()
<unknown module>! UE4Editor_Core!FOutputDeviceWindowsError::Serialize()
<unknown module>! UE4Editor_Core!FOutputDevice::Logf__VA()
<unknown module>! UE4Editor_Core!FDebug::AssertFailed()
<unknown module>! UE4Editor_CoreUObject!UObject::ProcessEvent()
<unknown module>! UE4Editor_UMG!UUserWidget::OnMouseLeave()
<unknown module>! UE4Editor_Slate!FSlateApplication::ProcessMouseMoveEvent()
<unknown module>! UE4Editor_Slate!FSlateApplication::SynthesizeMouseMove()
<unknown module>! UE4Editor_Slate!FSlateApplication::Tick()
<unknown module>! UE4Editor_UnrealEd!TickSlate()
<unknown module>! UE4Editor_UnrealEd!FFeedbackContextEditor::StartSlowTask()
<unknown module>! UE4Editor_Core!FScopedSlowTask::MakeDialog()
<unknown module>! UE4Editor_Engine!FStaticMeshStatusMessageContext::FStaticMeshStatusMessageContext()
<unknown module>! UE4Editor_Engine!FStaticMeshRenderData::Cache()
<unknown module>! UE4Editor_Engine!UStaticMesh::CacheDerivedData()
<unknown module>! UE4Editor_Engine!UStaticMesh::PostLoad()
<unknown module>! UE4Editor_CoreUObject!UObject::ConditionalPostLoad()
<unknown module>! UE4Editor_CoreUObject!FAsyncPackage::PostLoadObjects()
<unknown module>! UE4Editor_CoreUObject!FAsyncPackage::Tick()
<unknown module>! UE4Editor_CoreUObject!ProcessAsyncLoading()
<unknown module>! UE4Editor_CoreUObject!StaticTick()
<unknown module>! UE4Editor_UnrealEd!UEditorEngine::Tick()
<unknown module>! UE4Editor_UnrealEd!UUnrealEdEngine::Tick()
<unknown module>! UE4Editor!FEngineLoop::Tick()
<unknown module>! UE4Editor!GuardedMain()
<unknown module>! UE4Editor!GuardedMainWrapper()
<unknown module>! UE4Editor!WinMain()
<unknown module>! UE4Editor!__tmainCRTStartup()

Fix UE-51650

I am not able to find world outliner how to enable it?

Undefined sysmbol: typeinfo for AActor when cross-compile linux dedicated server on windows

Delay nodes occasionally don't fire the "Completed" output in a nativized build

An error occurred while trying to generate project files !?

How to achieve HLSL Multiple Render Target in Material blueprints?

How can i modify the param name in EQS node

Error UE5 5.0.3

Bonjour j'ai un petit problème c'est que je ne vois plus l'onglet "scability" pour changer les graphismes de uefn et j'ai pas trouvé l'option pour le faire revenir ?

How does UMG set overlapping layouts?