Unreal Engine Issues

Destructing NiagaraParameterStores causes multi threading write conflict

FNiagaraParameterStore::UnbindAll() may be called from both GameThread and RenderingThread. Each may modify the same Binding array, it causes infrequent crashes. In my environment, I was able to r ...

Disabling LQ lightmaps causes crash on mobile preview

Newly created Groom assets crash when opened after restarting the editor

Client PlayerState is null on joining online session

APlayerController::ClientStartOnlineSession() checks PlayerState at the start of a game after loading a level. Due to time needed to load in, client player state may may return NULL ...

GetAllMobileRelevantLayerNames drops those layers which are only connected to RuntimeVirtualTextureOutput Node

in UMaterial::GetAllReferencedExpressions, the mobile branch ignores every CustomOutputExpressions including RuntimeVirtualTextureOutput. ...

Editor crashes while switching to paint mode if material has a grass output and landscape visibility mask

Editor crashes while switching to paint mode if material has a grass output and landscape visibility mask. Frequency: 3/3 ...

Modifiers do not behave as expected when adding conflicting mappings of different priorities

Breaking a level instance can not remove the level instance from world

Currently there is no stable way to break level instances ...

Physics Constraints do not have the same values if they are part of an 'Always Loaded' level

Physics Constraints do not have the same values if they are part of an 'Always Loaded' level. They will work correctly in the Persistent level and a level that is Streamed in. This becomes problem ...

Android ETC2 Debug Builds Crash on Startup

Android apps build with the debug configuration on ETC2 will crash on launch. ...