Unreal Engine Issues
Unreal Engine Issues
AI in sublevel calling actors in persistent level crash editor when sublevel is not visible
UE - AI - Aug 11, 2016If an AI is moving between points in the persistent level but is located within a sublevel and the sublevel is set to not visible, there is a chance that the editor will eventually crash. Setting Is ...
Mac editor mobile preview crash with MSAA on
UE - Platform - Mobile - Mar 1, 2021setting GSupportsTimestampRenderQueries=false or r.GPUStatsEnabled=0 can fix it ...
Skeletal Mesh motion vector are output only for the last sample of Spatial Sample Count
UE - Virtual Production - Tools - MRQ - Jan 24, 2025Skeletal Mesh motion vectors are output only for the last sample of Spatial Sample Count, while Static Mesh motion vectors are output in all samples. UDN: [Link Removed] Slack thread: [Link Remo ...
Height fog removed in split screen when player1 is facing the opposite direction.
UE - Graphics Features - Sep 23, 2021Please see the UDN for a potential fix/workaround description. ...
Hardware Raytracing on Lumen can cause a crash on AMD Radeon GPUs
UE - Graphics Features - Lumen - Jul 29, 2025Hardware Raytracing support can cause a crash on AMD Radeon GPUs when creating the RT pipeline state. ...
Tessellation doesn't render in certain levels of ContentExamples with Intel4600
UE - Graphics Features - Jan 20, 2017Tessellation will not be rendered in the examples inside of the Material_Nodes and Material_Properties levels of Content Examples. ...
Import overwrite Yes to All/No to All broken
Tools - Jan 4, 2017This is a painful bug for audio, because many times we are replacing hundreds if not thousands of files this way. ...
HTML5 fails during Package Command with ASM enabled
UE - Platform - Mobile - May 10, 2017While testing in //UE4/Release-4.16 CL 3432136 in Binary – Launching a blueprint - FirstPerson template to Chrome encounters an error.LogPlayLevel: Program.Main: ERROR: AutomationTool terminated wit ...
WindowsVideoRecordingSystem can start late to record when a Record/Start action is executed.
UE - Media Framework - May 30, 2024The WindowsVideoRecordingSystem can start to record late when a StartAction is done. Not sure if it starts to record late, or the first seconds of the resulting video are ommited when the mp4 file i ...
"ERR: Transient text cannot be serialized" after converting to 4.8
UE - Foundation - Core - Jul 3, 2015"ERR: Transient text cannot be serialized" after converting to 4.8. Many users are seeing them in the logs. Example Project: [Link Removed] ...