Unreal Engine Issues

MRG - Additional Post Process Render have a black alpha channel

Additional Post Process renders always have a black alpha channel ...

"Could not find static actor" errors on standalone editor client when connecting to PIE server

This seems to be due to how FObjectReferenceCache and UEngineReplicationBridge handle remapping object paths for PIE. When creating the object reference handle, the object’s path should get renamed ...

DynamicMaterialParameters Niagara module resets write flags on emitter update

When using the DynamicMaterialParameters Niagara module in UE 5.6, 5.7, and UE5-Main (CL 50298778), updating an emitter causes Boolean values, such as Index0Float0Write, to reset to default values, ...

The infamous "smearing" is still present when SceneCaptureComponent2d is active

Changing the ComponentClass of a ACharacter twice and trying to set a SkeletalMeshAsset crashes the engine

Changing the ComponentClass of a ACharacter twice and trying to set a SkeletalMeshAsset crashes the engine with a "Cannot replace existing object of a different class" message. The conditions to re ...

Rotated RetainerWidget does not account for rotation during hit testing

Hit testing for widgets contained within a RetainerWidget does not correctly account for rotation applied via render transforms . While the content renders with the expected rotation, hover and clic ...

GameplayTagQuery AutoDescription not refreshed after GameplayTag redirect on load

FGameplayTagQuery does not refresh its cached AutoDescription after GameplayTag redirects are applied during asset load. As a result, after renaming a GameplayTag and restarting the editor, the Game ...

Multicast RPCs may be sent to clients in a different level with Replication Graph

UReplicationGraph::ProcessRemoteFunction does not check if the client has the same loaded world as the server when sending a multicast RPCs. For actors that are persisted partway through a seamless ...

[Enhanced Input] The action instance data is incorrectly reset when you call "Add mapping context" on the same mapping multiple times

This is somewhat related to [Link Removed] Closed and was brought up by a [Link Removed] Setting the CVar input.bRespectIM ...

Editor ensure in USceneComponent::OnComponentDestroyed during Blueprint compilation GC

An editor-only ensure can trigger during BP compilation when garbage collection cleans up transient components created as part of component replacement. During recompilation, old component instances ...