Unreal Engine Issues

CreateDynamicMaterialInstance will pull from the base rather than overridden mesh on SkinnedMeshComponent when run from construction script

When UPrimitiveComponent::CreateDynamicMaterialInstance is called on a skinned mesh, and the input material is invalid, we call USkinnedMeshComponent::GetMaterial to get the base material on the exi ...

MakeArray wildcard node gives a compilation error when being used in a Blueprint Macro.

There is an error with the SmartMacroInterface, where you can't use an empty wildcard "Make Array" node. This error makes the blueprint not compile and the macro unusable. Disabling the bUseSimpleWi ...

Circularly referenced blueprints cause stack overflow in a package game without IOStore

Editor crashes when the "Find in Blueprints" dialog runs its indexing task after any SlowTask was canceled by the user

If any SlowTask is canceled by the Editor's user, and later on the "Find in Blueprints" dialog is opened and needs to perform its async indexing task, the Editor crashes on thread FAsyncSearchIndexT ...

In class UCancellableAsyncAction, methods IsRegistered() and ShouldBroadcastDelegates() still return true after Cancel() or SetReadyToDestroy() unregisters the object.

Class UBlueprintAsyncActionBase provides methods RegisterWithGameInstance() and SetReadyToDestroy(), which respectively register and unregister the object with the game instance. Derived class UCanc ...

In Editor, Blueprint resources are not freed up when the Blueprint is closed

It appears that the preview scene used to render thumbnails is not destroyed after a thumbnail is rendered, even after the blueprint editor is closed and GC is run. Also found in Release-5.4, CL: 31 ...

UDataTableFunctionLibrary::AddDataTableRow() fails for blueprint-defined row structure types

The editor-scripting blueprint node "Add Data Table Row" fails when the Data Table uses a Row Structure that was defined in blueprint. Internally, it checks if the passed-in UScriptStruct is derived ...

Overriding a struct member field's default value on a BP-added component in a BP asset will no longer allow the user to edit that struct member on instances of that BP's component if the member is deprecated.

Properties that are deprecated are (incorrectly) not currently being propagated to instances by the duplication logic that we use to instance BP-added components as part of Actor-based BP constructi ...

Blueprint "Set by ref" (UK2Node_VariableSetRef) does not mark properties dirty for push replication

When using Push Replication with blueprints, UK2Node_VariableSetRef nodes do not mark a property as dirty and so the variable is not replicated. ...

Instanced properties do not update in actors placed in a level that is not currently open

The user is specifically having a problem with TArray<TObjectPtr<>> however I have also reproduced this error using a single TObjectPtr<>, raw uobject pointers & all three previous methods within a ...