Unreal Engine Issues
Unreal Engine Issues
Popping Ribbon UVs
UE - Niagara - Mar 10, 2025Please see the Additional Link for related UDN information. The UV popping described can be subtle, depending on settings; it's affected by spawn rate and GPU vs CPU. The popping shown in the gif t ...
Attaching a removed Actor in Sequencer causes a crash
UE - Anim - Sequencer - Jan 6, 2020This is a regression from 4.23.1 (CL-9631420) where Sequencer just displayed the re-attached binding in yellow text instead of crashing. The user suggests that the deleted actor should be removed fr ...
Animation Modifiers that contain a null Animation Sequence value cause the Engine to crash when applied to an Animation Sequence
OLD - Anim - Nov 14, 2018When an Animation Modifier passes a null Animation Sequence value to an Animation Sequence the Editor will crash. This is a regression from 4.20.3 (CL-4369336). This was reported and tested in 4.21 ...
Crash when a nested widget is set to "Force Slow Construction Path"
UE - Editor - UI Systems - May 25, 2018Does not occur if the root widget also disables the fast path. As a result, the current workaround is to ensure that the fast construction path is also disabled on the parent widget by making sure ...
Editor primitives render incorrectly in stereoscopic with instanced stereo
UE - Platform - XR - Aug 17, 2016Trigger box icons move around when oculus head movement is used. Found in //UE4/Release-Staging-4.13 @ 3090357 QA-Promotion map Edit: 08-22: This affects volumes as well as their editor icons, upd ...
Using Blend Physics Weight causes skeletal mesh to spin at high speed
OLD - Anim - Mar 5, 2015When Phyics Blend in the PHAT editor is set between 0 and 1, the user character will spin wildly. User has image of this affecting character in game whereas I was only able to replicate it in the PH ...
Using FEditorModeID for the "Mode" console command does not switch the modes tab
Tools - May 10, 2016Using the FEditorModeID for the different editor modes does not affect actual modes available in editor Modes tab. Example: Command "Mode EM_Foliage" does not switch to the foliage mode Workaround ...
Child Actor component is duplicated in Standalone Game
UE - Gameplay - Jan 12, 2017Child Actor component is duplicated in Standalone Game. No other play modes or packaged game are affected. The additional actor will disappear after 1 minute. *This is a regression: Doesn't occur ...
Set All Bodies Below Simulate Physics Only Causes Ragdoll Effect if it is Set to Root Bone
UE - Simulation - Physics - Sep 29, 2017-This functions in 4.16 -Physics will only simulate if the Third Person Character bone name variable is set to root -Physics does not affect any other bone -Make sure to plug in set in collision f ...
Fatal error when pausing and sleeping when using Launch Windows Game
UE - Graphics Features - Nov 13, 2017When using the pause command in a launched game and putting the computer to sleep it causes the fatal error "GameThread timed out waiting for RenderThread" when logging back in and resuming work on ...