Unreal Engine Issues
Unreal Engine Issues
Sequence with restore state set is causing a "Fatal world leaks detected" crash
UE - Anim - Sequencer - May 14, 2025We recently had a few occurrences of crashes caused by a "Fatal world leaks detected" error when unloading a level (in a packaged game and in editor). I tracked down what was keeping a references t ...
RigidBody parameters not working (external force and others)
UE - Simulation - Physics - Character - May 14, 2025We are running into issues where the parameters of the RigidBody node in an ABP are not being applied at all when running the ABP in PIE even when the parameters are working correctly in the ABP pre ...
RayTracingManager::Tick() called twice in a single game frame
UE - Graphics Features - Ray Tracing - May 14, 2025A licensee has shared a project with us, in which they are able to trigger a problematic case where the RayTracingGeometryManager is ticked twice during a single game frame. It would be good to inve ...
Bug: Level Sequence OriginOverrideLocation not propagating to newly added nested ShotTracks
UE - Anim - Sequencer - May 14, 2025Within a Level Sequence, it's possible to override the transform (OriginOverrideLocation) of a ShotTrack. This generally works as expected — all nested ShotTracks should inherit and apply the transf ...
Skeleton does not match Full Body IK node debug.
UE - Anim - Rigging - Control Rig - May 13, 2025In a simple setup of the Fullbody IK control rig node, when you turn on the debug draw of the ik solve. The lines and the skeleton do not align. ...
ResavePackages commandlet (buildlighting) fails/asserts on reflection captures in non-visible sub-levels
UE - Graphics Features - May 13, 2025When building reflection captures through the ResavePackages commandlet, it frequently triggers an ensure inside of ReflectionEnvironmentCapture.cpp. If distributed shader builds start causing prob ...
Updating niagara with Advance Simlation during game pause causes memory leak
UE - Niagara - May 12, 2025When updating the niagara component in AdvanceSimulation with a tick, the memory of the Niagara tag keeps increasing between pause and resume. ...
PIE Seamless Travel with a standalone level instance causes assert in UWorldPartition::BeginDestroy
UE - World Creation - Worldbuilding Tools - Level Instances - May 8, 2025This check is hit on the server instance while it is performing garbage collection during the seamless travel. During this garbage collection, it will determine that the UWorldPartition object belon ...
Unreal Editor Submenus Disappear on Mouse Hover on Linux during Remote Session
UE - Editor - Applied Usability - May 8, 2025Sub-menus disappear when using Linux in a remote session in launcher build of UE Release 5.5.4. ...
Actor Channel failure occurs when quickly unloading and loading a streaming level
UE - Networking - May 8, 2025With high enough latency, quickly unloading an reloading a streaming level with a replicated actor on the server can cause the actor channel on the client to fail to find this actor: UActorChannel:: ...