Unreal Engine Issues
Unreal Engine Issues
Iris - large fast arrays serialize multiple elements when only one is dirtied
UE - Networking - Iris - Apr 8, 2025This seems to be a result of how the changemask is handled for fast arrays. Because the changemask is a fixed set of bits (defined by IrisFastArrayChangeMaskBits), a single bit can represent multipl ...
WebBrowser widget appears to remove itself from other widgets in user's project
UE - Editor - UI Systems - Jun 30, 2016WebBrowser widget appears to remove itself from other widgets in user's project ...
Record with timecode as source but false on start at Timecode causes crash
zComponent - Archive - Feb 13, 2023Gear VR Touchpad input broken
UE - Platform - XR - Jul 27, 2018Gear VR Touchpad input no longer functioning in 4.20 Noticed this appearing in 4.20 logs from device (did not appear in 4.19 logs): LogOcInput: Get touchpad main with data 0.000000 0.000000 Also t ...
Local lights appear broken when baking lighting with GPU Lightmass
UE - Rendering - Features - Jun 2, 2025Encountered an issue where local lights appear to be broken when baking lighting with GPU Lightmass. See screenshots attached. Tested regression in //UE5/Release-5.5 @ CL40574608 and the issue does ...
Sequencer fails to package during Build command for ASTC
UE - Platform - Mobile - Jan 15, 2017When attempting to test for ESDSR on Android, the Sequencer project fails to package towards the end of the Build Command. Runtime/OpenGLDrv/Public\OpenGLESDeferred.h(267,5) : warning: 'OPENGL_ES2 ...
Material Editor: Highlight/Isolate should warn user when using Nanite Mesh
UE - Rendering - Features - Nanite - Oct 27, 2022Editor should visually warn the user that this feature doesn't work with Nanite, or that the Nanite Preview mesh needs to be enabled (or forcibly enable it when they attempt to use this option), oth ...
Package does not load using Vulkan on Oculus Quest
UE - Platform - XR - Jul 31, 2019When attempting to open a package using Vulkan, the application is loading and never opens. This happens for Launch On as well. This issue may be related to [Link Removed]. I was not able to reprod ...
Auto save settings are not saved when adjusted via Quality setup in Statistics
TM - Tools - Sep 25, 2025Crash on loading pre-4.20 cloth data when compute skin cache is enabled in 4.21
UE - Graphics Features - Mar 19, 2019According to information from the licensee, the else clause was added to "FSkeletalMeshLODModel::(GetClothMappingData()" at CL 4437969 , but if it is the cloth data existing from 4.20 or earlier, it ...