Unreal Engine Issues
Unreal Engine Issues
A Simulating Physics component with StartAwake = false will be awoken by a Welded component
UE - Runtime - Simulation - Jan 10, 2025A Simulating Physics component with StartAwake = false will be awoken by a Welded component If a welding occurs during the call to OnCreatePhysicsState, this breaks the start awake disabled flag. Th ...
Chaos Mover crash in standalone editor client
UE - Runtime - Character - Aug 18, 2026When using the Chaos Mover with resimulation enabled, standalone editor processes running as a client will crash around 80% of the time upon startup. ...
iOS package with Metal Desktop Renderer enabled crashes on iPhone
UE - Rendering - Architecture - RHI - Oct 11, 2024iOS package with Metal Desktop Renderer enabled crashes on iPhoneThis issue does not occur if Metal Desktop Renderer is disabled ...
[AI] Crash when gathering heightfield geometry on worker thread
UE - Runtime - Character - Jun 25, 2025From the body of the ticket: We aim to do as much of the work off the game thread as possible to avoid impacting frame rate. We've recently found a crash during collection of the geometry slices fr ...
Crash in FMovieSceneNumericVariant::Set when loading a Level Sequence with Custom Time Warp on Android
UE - ACT Character - Sequencer - Aug 14, 2026On Android, loading a Level Sequence fatals in the async loading thread: Assertion failed: (NewValue & ~PAYLOAD_Bits) == 0 MovieSceneNumericVariant.cpp:133 Unable to store a pointer outside of a ...
Assets are invalidated if named or renamed with a leading underscore
UE - Editor - Content Pipeline - Content Browser - Jan 12, 2017Renaming or naming assets with a leading underscore invalidates the asset. The assets will be renamed to "None" and report occupying 1KB in space. It is no longer possible to interact with an object ...
Landscape Resize Tool Stall
UE - Graphics Tools - Terrain - Landscape - Oct 3, 2023From licensee: We're trying to reduce component count on our landscape using the resize tool. When modifying the landscape execution never completes. When I hit pause and get a breakpoint to see wh ...
Cannot key font material for UMG Widget animations
zComponent - Archive - Sep 14, 2023Crash launching QAGame onto Windows
UE - Graphics Features - Mar 23, 2017The editor is crashing when launching onto windows. This is not occurring in Main. ...
PhysX crash when SetMaterial is called
UE - Simulation - Physics - Mar 14, 2016When provided sample project is run in PIE, crash occurs after call to SetMaterial() is made in code. Downloadable Project: [Link Removed] CrashReporter: [Link Removed] ...