Unreal Engine Issues

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

Blueprint "Replace Variable with..." option doesn't show Input Parameters as an option

This appears to be an oversight with input parameters. UEdGraphSchema_K2::GetReplaceVariableMenu should also search the list of input parameters when finding matching replacements. ...

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 ...

Data Asset Instances created from Blueprints and are not selectable in asset pickers until their parent Blueprint is loaded. They are also not displayed correctly in the Content Browser

Consider a C++/BP class containing an EditAnywhere/InstanceEditable variable with type (UDataAsset*), (UPrimaryDataAsset*), or any of their subclasses. When setting this variable using a Property Ed ...

Blueprint compilation resets settings on level-placed actors and inherited templates

Triggering an actor component recompilation resets all the variables to the default state on spawned actors in the level. Users can unintentionally lose property settings on placed actors in a worl ...

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 ...

UClass::SparseClassDataStruct null at editor-time for child blueprints until compile

Child blueprints of a blueprint of a native actor class with sparse data can have an incorrectly null SparseClassDataStruct value, and thus fail to initialzie their SparseClassData. This affects edi ...

CPF_TextExportTransient and RF_TextExportTransient inconsistent behavior

The TextExportTransient can be specified as a property flag and object flag. Behavior is inconsistent: there are many ways in which an object marked TextExportTransient can still be part of the text ...

Variables displaying the wrong category on the Class Default details panel.

Blueprints might get corrupted after inheriting multiple times.

Blueprints might get into a corrupted state when they are inherited for a big number of times. Starting from a C++ class, if you then create a BlueprintClass from the C++ class, and keep creating ne ...