Unreal Engine Issues
Unreal Engine Issues
LIVE: EDITOR: Extremely large trigger volumes registering overlaps multiple times upon single overlap event
UE - Simulation - Physics - Sep 9, 2014Update: 1/27/2015 User reporting multiple overlap events/end over lap events firing on smaller triggers, their specific dimensions were 400 uu x 2000 uu on a capsule Build: 4.4.2-2289767 Descript ...
Additive Animation does not work as intended when Ref Frame Index is more than zero
UE - Runtime - Animation - Dec 19, 2023In some conditions, additive animation shows different/wrong behavior on Standalone Game and packaged game, from the other PIE. Watch the attached video. [Link Removed] The key points to reproduce ...
Unreal 5.7 Trace server not working on Rocky 8
UE - Platform - Linux - Aug 6, 2026UnrealTraceServer built on a Rocky 8 machine yields a binary that depends on versions of glibc and glibcxx higher than the 2.28 version provided by Rocky 8.$ ldd UnrealTraceServer./UnrealTraceServer ...
Regression: "Play particle effect" anim notifies are not seen in the editor playing level sequence/matinee when Attached is set to false
UE - Graphics Features - Dec 21, 2017Not Attached particle system is not seen in the viewport of the editor. This particle will be seen normally when PIE. Regression? Yes. This issue is not reproduced in 4.17 version. You can simply ...
Show Flags are changed to the state that they were set on editor startup when switching to a different level
UE - Graphics Features - Jun 15, 2018Show Flags are changed to the state that they were set on editor startup when switching to a different level It appears that the state of Show Flags are stored in the editor on shut down, this is c ...
Imported Maya animation seems to be 1-frame off in Unreal
OLD - Anim - Apr 5, 2016A licensee reported this issue on UDN. They are seeing a discrepancy with animations imported from Maya. In this case, they appear to be off by 1-frame. We've talked about this on Slack and I know ...
Audio/Video out of sync after seek
Media Framework - Jan 29, 2018There is an issue that sometimes occurs when using the seek option in the media player while the Decoder is set to WMF. When this happens the audio desyncs from the video and for the rest of the vid ...
SetCollisionProfileName and SetCollisionEnabled aren't working in Construction Script
UE - Simulation - Physics - Dec 5, 2019This is a regression from 4.22.3 (CL-7053642) where this setup executed as expected. Toggling Collision Profiles in 4.23.1 (CL-9631420) and onward do not affect the Static Mesh and it acts as if it ...
Major performance drop with instanced meshes since PhysX 3.4 upgrade
UE - Simulation - Physics - Mar 15, 2017Major performance drop with instanced meshes since PhysX 3.4 upgrade Regression: YES Worked: 3172292 (4.13.2) Broken: 3249277 (4.14.3) For me, my results were: 4.8 through 4.13 No Collision - ...
HotReload: Static Mesh property reset on custom Static Mesh Component in Pawn Blueprint when a public property is changed to private in the parent Static Mesh Component code class
UE - Gameplay - Blueprint - Aug 24, 2018Performing a Hot Reload after changing some properties in a custom Static Mesh Component code class from public to private appears to reset the static mesh set for any Pawn Blueprints that use that ...