Unreal Engine Issues

Child actor primitive root component failing to decrement attachment counter to 0 before UPrimitiveComponent::FinishDestroy

Dragging a BP actor containing a child actor component of an actor class with a static mesh as its root component into the scene viewport will cause artifacts and hit SceneData.AttachmentCounter.Get ...

Non-terminating while loop when creating a new BP Actor and quickly switching between components.

It is possible for the while loop in UnrealEditor-SubobjectDataInterface.dll!USubobjectDataSubsystem::GetActorRootHandle(const FSubobjectDataHandle & StartingHandle) Line 815  to not terminate when ...

Crash accessing a non-empty TSet or TMap local variable in a blueprint function

Getting a crash when trying to access a non-empty TSet or TMap local variable in a blueprint function. This is only occurring with local variables. The issue also does not occur if the TSet or TMap ...

Check hit when setting push-model array from a different actor's blueprint

This is due to the same reason behind [Link Removed], as the stack object is passed to MARK_PROPERTY_DIRTY rather than the array property's owner.  ...

Crash on hot reload for DynamicDelegate

This issue may be badly implemented, but the reference to the VTable may be incorrect during a hot reload. Crash always in sample project. Summary:Call ForeachRow function in Custom Struct constr ...

Crash in UCanvas::K2_DrawMaterial wioth VideoStreamComponent

Calling UMoverComponent::IsModifierActiveOrQueued() immediately after calling UMoverComponent::K2_QueueMovementModifier() will return false

Calling UMoverComponent::IsModifierActiveOrQueued() immediately after calling UMoverComponent::K2_QueueMovementModifier() will return false. Checking the code, IsModifierActiveOrQueue() calls FindMo ...

Renaming actors between levels during PIE causes issues

When renaming actors during PIE the actor generates a new, non memory/temporary, actor package underneath the PIE world- this is then causing checks in EnumerateMemoryAssetsHelper (in AssetRegistry. ...

Compressed anim sequence data isn't updated immediately when a mesh is reimported

It seems that when reimporting a mesh that has added bones we aren't updating the compressed data within the anim sequences to account for the change in indicies of the virtual bones. If a user cal ...

Compressed anim sequence data isn't updated immediately when virtual bones are added

It seems that the compressed animation data within an anim sequence is not updated immediately when a virtual bone is added to a skeleton. If the user attempts to call UAnimSequence::GetBoneTransf ...