Unreal Engine Issues
Unreal Engine Issues
Editor crash on level load when bUseActorFolders is true after dragging Actor into another folder in the Outliner
UE - Engine Scaling - Streaming - OFPA - Mar 7, 2023From licensee: Hello! Our level streaming setup enables the bUseActorFolders on our levels. When moving the Actor into another folder via the Outline, the editor will crash on the next load Assert ...
Some instances spawned by NeagaraDataInterfaceChaosDestruction breaking event will be set location to the world origin
UE - Rendering - Architecture - Niagara - Nov 29, 2024The following code can often be found in UNiagaraDataInterfaceChaosDestruction.const int32 ParticleID = ParticleIDParam.GetAndAdvance() - LastSpawnedPointID + 1; The LastSpawnedPointID is usual ...
Path not found during exporting XMPs with the exportXMP command
RS - Alignment - Apr 8, 2026Found in 2.1.1.11916 (R211). RS fails to export the XMPs when certain settings are remembered in RS (Attached rscofig file). This is a regression and didn't occur in the last RS 2.1 public release. ...
"Render in main pass" setting appears to be ignored when using ES3 and "Render in Custom Depth" is enabled
UE - Platform - Mobile - Jul 17, 2019it appears that meshes cannot be removed from the main pass and still write to the custom depth pass when using ES3.1 ...
Sequence director fires events multiple times if multiple levels are streaming.
UE - Anim - Sequencer - Nov 7, 2018The new event track in level sequences fires the number of times that there are levels streaming. ...
Misspelling in Editor Preferences: Experimental
Tools - Sep 16, 2015UE4.9.1 under Editor Preference3s ->Experimental -> Cooking it says "Iterative cooking for builds launched [form] the editor." Correction: [from] ...
Soft angular constraints solve velocity like hard constraints
UE - Runtime - Simulation - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
Intermittant motion blur issues in content heavy scenes
UE - Rendering - RHI - Jul 30, 2026When using the following RHI/Render thread/GT sync configuration:r.OneFrameThreadLag 1r.GTSyncType 1 The previous skinning bone data can be corrupted and introduce visual artifacts on everything us ...
Crash in Android media plugins on Adreno devices with letters in version
UE - Platform - Mobile - Systems - Mar 2, 2022The logic to check the version number of Adreno devices does not work if there are letters in the version (like Adreno 642L). ...
RootMotion travel distance get affected by ForceAnimRate
OLD - Anim - Nov 24, 2016A root motion controlled character would travel further than they should when both EnableUpdateRateOptimizations is on and a.URO.ForceAnimRate is set above 1. Changing "Root Motion from Montages On ...