Unreal Engine Issues
Unreal Engine Issues
Simulate motion vectors can fail on camera cuts
UE - Anim - Sequencer - Jun 11, 2024r.MotionVectorSimulation 1 should simulate motion vectors when cutting cameras, but this appears to be broken on some loops. ...
The visibility state of on-screen stat messages is not restored correctly after entering and leaving PIE. This also affects other important on-screen messages like map warnings and debug messages.
UE - Editor - UI Systems - Nov 28, 2024Currently, the ShowStats viewport option is automatically enabled when entering PIE and automatically disabled when exiting PIE. This forced disabling happens even if the option was enabled prior to ...
Jump Animation for FPS template character breaks on land
OLD - Anim - May 6, 2015When jumping in the first person template project, the "is in air" animation continues to play after landing. Solution: Switching out the "FirstPerson_JumpStart Asset" node for the "FirstPerson_J ...
For each "EnumName" nodes do not update when passed into a create widget node via an exposed variable
UE - Gameplay - Blueprint - Nov 1, 2016For each "EnumName" nodes do not update when passed into a create widget node via an exposed variable ...
UE5.6+ - Mutable - IDPrefix crash when combining Child Objects, Add to Mesh Component and Extend Mesh Section.
UE - Anim - Mutable - Jul 21, 2025So the issue seems to be a combination of Add To Mesh Component and Extend Mesh Section. I've tried this in Epic Launcher 5.6, 5.6 in-house modified engine as well as ue5-main 5.7 from git (editor ...
Enable Slate layout caching Will cause the Stop/Play Buttons to disappear
UE - Editor - UI Systems - Slate - Dec 17, 2018When using the command Slate.EnableLayoutCaching 1, The Play button is removed from the tool bar after exiting play. ...
InstancedStaticMeshes disappear in Shipping builds on mobile when affected by dynamic point lights
UE - Platform - Mobile - Aug 22, 2019This ticket is to add the safe workaround for 4.23.1, with a more optimal fix coming in 4.24. ...
Hair shading emits light when Lumen is enabled
UE - Graphics Features - Jun 6, 2022This artifact does not occur when Lumen is disabled. Also, moving Roughness closer to 1 will reduce the effect. ...
Project crashes when exiting mobile preview
UE - Gameplay - May 27, 2015User project crashes when exiting from mobile preview. Frequency: 5/5 Crashreporter: [Link Removed] ...
Sequencer: Undoing creation of a new section can call section drawing code with viewmodel tree in invalid state
UE - Anim - Sequencer - Aug 1, 2024The Section reference in ISequencerSection::GetSectionHeight can be in the process of garbage collection during an undo of a section addition- this causes things like GetTypedOuter<UMovieSceneTrack> ...