Unreal Engine Issues
Unreal Engine Issues
Crash on adding elements to a TMap property
Tools - Jul 25, 2019Adding elements to a TMap<int32, int32> causes the editor to crash if the TMap has a default value associated with it. Tested in 4.22 (CL - 4753647), 4.23 (CL - 7445012), 4.24 (CL - 7605614) ...
FCollisionProfileNameCustomization doesn't support Multiple Values
UE - Editor - Applied Usability - Aug 16, 2023The class FcollisionProfileNameCustomization customizes the property editor for the class FcollisionProfileName. However, it does not handle the case where multiple assets/actors are being edited si ...
ARCore Non-AR Camera inherits AR Camera rotation
UE - Platform - XR - Jul 25, 2018When transitioning from AR map/pawn to Non-AR map/pawn the direction the phone is facing is applied to Non-AR pawn. Only occurring on Android/ARCore Also tested in Main CL #4229747 Tested with Pi ...
Hot Reload fails if a project and Engine are placed next to each other in the same root folder that has the same name as the project
UE - Foundation - Cpp Tools - Hot Reload - Jan 8, 2019Hot Reload does not work if a project and the Engine that project is associated with are placed next to each other in the same root folder that shares the same name as the project. During the Hot Re ...
Previous Tangent Recalc` and Size by Life misbehave at low FPS
UE - Niagara - Jun 18, 2019At low FPS particle systems with "Previous Tangent Recalculation" enabled in the Ribbon Data result in messy mesh generation. Found in 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6925347, and 4.24 ...
Skybox not rendering in packaged project with Vertex Fogging enabled
UE - Platform - XR - Feb 10, 2020Vertex Fogging setting causes skybox material on large skybox mesh to not be rendered. Confirmation for 4.25 blocked by [Link Removed] ...
TUnion copy constructor causes the editor to assert due to Unrecognized TUnion subtype
UE - Foundation - Core - Mar 15, 2016The TUnion copy constructor causes the editor to toss an assert due to it claiming that the passed in TUnion is of an Unrecognized TUnion subtype. ...
Debug values not updated for parallel eval Animation BPs
OLD - Anim - Oct 22, 2019The watched values of a level instanced ABP do not update if a.ParallelAnimEvaluation is enabled. ...
Editor vs Runtime: Inconsistent data layer behavior when attaching actors
UE - World Creation - Worldbuilding Tools - World Partition - Jun 5, 2025In editor, data layer system respects the data layer settings for each actor, but at runtime, the condition check is made collectively for each actor cluster, resulting in differences in behavior. ...
Fbx scene re-import is not marking as dirty new asset
Tools - Nov 10, 2016Make sure all created and modified asset in a re-import are mark dirty. Creating a collision mesh was dirtying the asset, this is why the bug is only when we are not generating collision mesh. ...