Unreal Engine Issues

Simulate motion vectors can fail on camera cuts

r.MotionVectorSimulation 1 should simulate motion vectors when cutting cameras, but this appears to be broken on some loops. ...

Race condition between D3D12 Buffer Defrag and View creation

A UDN user reported that the D3D12 resource allocator defragmentation operation races with view creation. View creation needs to be always deferred to the RHI thread. ...

[PCG] Delayed PCG Component Unregister causing stale pointer crash

Missing display units initialization from project settings

From customer: Hi there, I stumbled upon a bug where the display units as set in the Project Settings under the Editor Appearance category for properties were not getting displayed properly and was ...

RVT Tiles Update Slowly When Enabling Nanite Tessellation On Landscapes

RuleProcessor is not listed in the Window menu in 5.4

Since CL-28416011, Sections in Window menu are broken and the RuleProcessor can not be registered in the menu. (See attached imanges) Following workaround restores the sections and fixes the issue. ...

Setting a poseable mesh component as leader component for a skeletal mesh component causes an access violation.

When a skeletal mesh component's leader component is set to a poseable mesh component, the application will run into an access violation when it tries to update animation curves and morph targets. ...

Camera Cuts lock doesn't work when simulating

Lock Viewport to Camera Cuts of CameraCutTrack stopped working from version 5.4 during PIE's simulation. This is a regression from 5.3 behavior where the lock remains when simulating. Locking to ind ...

OFPA: Cooking fails with nested actors

[AI] AgentToNavDataMap still contains entries when cleaning up navigation system

The navigation system has errors in the log for agents still being mapped to navigation data in CleanUp. This appears to stem from agent step height being recalculated in ARecastNavMesh::SetConfig i ...