Unreal Engine Issues

Setting GDelayTrimMemoryDuringMapLoadMode = 2 causes crash on same map reload

GDelayTrimMemoryDuringMapLoadMode is a CVar that controls whether a garbage collection should take place during map change after unloading the previous map and before loading the new one. By default ...

In-editor hitch when deleting one actor in a world with many loaded actors

When editing a level with many actors (1000+), deleting an actor results in a noticeable hitch: the editor becomes unresponsive for seconds. This hitch becomes longer the more actors are loaded and ...

Renaming a Blueprint interface asset doesn't update the ImplementedInterfaces list in the Blueprint editor's Class Settings tab

There is no UI refresh for the Implemented Interfaces list in the Blueprint editor UI after a Blueprint Interface asset is renamed in the Content Drawer. Consequently, the interface cannot be remove ...

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 ...

Denoting a custom data source root for import/export pipeline is not hooked into file path resolution for driving other parts of the UI

Blueprint debugger: variable getter node displays wrong object's value

After triggering a breakpoint in blueprint, variable getter nodes can display the value of a different object than the node's target. For example: if an actor class has a value MyBool and the bluepr ...

BP property initialization fast path does not handle non-instanced properties assigned to default subobjects correctly

Non-instanced object ref properties are incorrectly being skipped at property initialization time when Blueprint class instances are spawned with the fast property initialization path enabled. This ...

NiagaraComponent attached to the character won't stay active when travelling to a new level using seamless travel

The pawn character is added to APlayerController::GetSeamlessTravelActorList, so it'll be persisted during server travel. The Niagara component is spawned during BeginPlay and activated manually. W ...

In the Anim Sequence Editor set a Notify's MontageTickType to be fixed to BranchingPoint if that Notify is a Native Branching Point

To avoid confusing users when working with a Native Branching Point Notify set its MontageTickType to be fixed to BranchingPoint.  ...

SceneQuery: UWorld::SweepSingleByChannel doesn't return BoneName on skeletal meshes with per-poly collision enabled

Scene queries when encountering skeletal meshes with per-poly collision enabled do not return a bone name in the HitResult. Returning the BoneName always or having it as an option via FCollisionQuer ...