Unreal Engine Issues
Unreal Engine Issues
ULevelInstanceSubsystem::CreateLevelInstanceFrom() is not honoring parameters bAlwaysShowDialog and LevelPackageName
UE - World Creation - Worldbuilding Tools - Level Instances - Aug 6, 2025A Level Instance or Packed Level Actor can be created through editor scripting by using function ULevelInstanceSubsystem::CreateLevelInstanceFrom(), which receives parameters packed in the FNewLevel ...
Iris - RPCs split into partial blobs aren't received on non-replicated components
UE - Networking - Iris - Aug 5, 2025This issue does not occur if the RPC is not split into partial blobs. The RPC is received on the non-replicated component if Iris is disabled. ...
Environment Query System (EQS): EnvQuery runtime template object can be created with a non-unique name, corrupting the EnvQueryManager cache
UE - AI - Aug 5, 2025On file [Engine\Source\Runtime\AIModule\Private\EnvironmentQuery\EnvQueryManager.cpp:812], function UEnvQueryManager::CreateQueryInstance() uses StaticDuplicateObject() to create a new UEnvQuery* (d ...
EncompassesPoint always returns fase on ANavMeshBoundsVolume due to missing BodyInstance
UE - AI - Aug 3, 2025When calling EncompassesPoint on an ANavMeshBoundsVolume, the method always returns false even if the target point is clearly within the visible volume bounds. This occurs because AVolume::Encompas ...
Crash when changing parent of Material Instance with Layered Materials and viewing Layer Parameters
UE - Rendering Architecture - Materials - Aug 1, 2025Reparenting a MaterialInstance that uses Material Layers to another instance with a different layer configuration can cause the editor to crash when opening the Layer Parameters tab. This appears to ...
If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible
UE - Virtual Production - Tools - Jul 31, 2025If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible. The behavior only shows after d ...
The LightMixer window is making all scene lights visible once you toggle the visibility of a single light
UE - Virtual Production - Tools - Jul 31, 2025The LightMixer window is making all scene lights visible once you toggle a single light as visible. Any light source (except SkyLight) will be turn visible once a single light is made visible using ...
ULocalPlayerSaveGame::IsSaveInProgress always returns true after a save completes
UE - Framework - Jul 31, 2025ULocalPlayerSaveGame::IsSaveInProgress always returns true after the first save is requested. This is due to the return statement checking if either an error has yet to be reported or a success has ...
Destroying a welded actor is causing an Array index out of bounds crash on 5.6
UE - Simulation - Physics - Jul 30, 2025Destroying a welded actor is causing an Array index out of bounds crash on 5.6. The licensee has provided a repro project that reliably causes a crash whenever the spawned actor is destroyed. There ...
The CTRL+S shortcut does not save an opened Sequence it the Sequencer Window is undocked
UE - Anim - Sequencer - Jul 29, 2025The CTRL+S shortcut does not save an opened Sequence it the Sequencer Window is undocked. Docking the Sequencer Window to the main window fixes the issue. I've reproduced the behavior on UE versions ...