Unreal Engine Issues

check(!bPostTickComponentUpdate) fails triggered by ~FStaticMeshComponentBulkReregisterContext() and FD3D12DynamicRHI::ProcessInterruptQueueUntil()

Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears that it's not allowed to schedule mo ...

Light Leaking With Raytraced Shadows On Lights With Non-Zero Source Length

Light sources which have the source length attribute set to a value greater than zero seem to be leaking light through occluding geometry (see the image below and repro project). Moving it away from ...

Cannot instantiate an InstancedStaticMesh component with ConstructionScript

Starting with Unreal Engine 5.4, the logic for adding ISM instances by adding ISM components in the Construction Script (like below) has failed.  [Image Removed] This issue accidentally was introd ...

Landscape Layer Painting issues when painting near the edge of delete Landscape Proxies.

It appears that the landscape painting tool is not correctly taking into account deleted landscape sections, resulting in artifacts inside of the weight textures. ...

(BUG) Sequencer Root motion breaks down when using SwapRootWithActor, translation track and transform origin actor

When "Sequencer.ThreadedEvaluation.AllocationThreshold 8" is initiated, characters in a level sequence that have “Swap Root Bone Actor” activated on their animation will begin to slide very fast acr ...

Regression - Inherited component properties on actor instances of derived blueprints are silently reset to defaults when the blueprint is compiled, causing data loss

In certain circumstances, when a derived blueprint is compiled, all properties from its inherited components can be silently reset to defaults on instances placed on the current level. This results ...

For a TMap with C++ enum keys, deleting and re-adding a map entry in the Editor can corrupt the map data.

When adding an entry to a TMap using UE's property editors, in most cases the new entry comes with a default-initialized key (if such key already exists, the insertion fails). The case of a UENUM de ...

Sequencer- New takes will not respect project setting take number if initial asset doesn't have a shot number

With 5.2, we allowed the take separator to be multiple characters long. But it would appear that when using this feature, if you don't also have a 'shot number' before the take separator, then the n ...

RunAssetExportTask do not pass the automated property to the exporter

Sequencer- Cannot change multiple selected spawnable's class

Only the first selected spawnable actor binding will have its class changed when selecting 'Change Class' from the right click menu. ...