Unreal Engine Issues
Unreal Engine Issues
Crash after Clearing Sound Wave Asset and Deleting Media Player from Content Browser
Media Framework - Aug 8, 2016A crash occurs when deleting a Media Player asset from the Content Browser that contained a previously referenced Sound Wave asset. This issue does not occur in any past engine versions as the prev ...
KiteDemo: Bookmark spawn function broken if in Run mode
Docs - Samples - May 4, 2017While testing in KiteDemo - //UE4/Release-4.16 CL 3420042 in Binary – I found that pressing the bookmark attraction Scene keys (1 - 0) does not work as intended if user is in Run mode. ...
Actor instance FComponentReference to other actor instance gets nulled on other actor recompile
UE - Gameplay - Blueprint Compiler - May 21, 2024An editable FComponentReference property on an actor instance can be used to reference another actor's component in the scene. In 4.27 and earlier versions these references were retained when the ot ...
Enum to string conversion has different results in PIE vs Cooked builds
UE - Gameplay - Blueprint Runtime - Aug 17, 2021This is because the metadata is editor only and will be stripped in a cooked build. We should make the behavior of the to string function consistent between PIE and a cooked build. ...
Long delay on iOS Device Output Log can cost loss of logging on some devices
UE - Platform - Mobile - Feb 8, 2019If the delay to begin printing the log to the window is too long, some of the logging can be thrown out. This issue does not occur with Android Device Output log UPDATE1: The last time I reproduce ...
MakeMaterialAttributes and LandscapeLayerBlend produce unexcepted results for WorldPositionOffset
UE - Rendering Architecture - Materials - Nov 8, 2021For comparison, this issue doesn't seem to occur when recreating the setup with Set Material Attributes/GetMaterialAttributes. It seems isolated to the Make/Break nodes. ...
Physics Assets do not show Z (Blue) axis swing graphic.
UE - Simulation - Physics - Sep 13, 20164.13 Physics Asset graphics shown for swing settings in Physics Assets doesn't show for Z (blue) axis. Regression from 3039270 (4.12.5 Release), found in 3106830 (4.13 Release). ...
Cannot change inherited variable default values through details panel
UE - Gameplay - Blueprint - Aug 19, 2015Child blueprints cannot change the default values of inherited variables. ...
Crash when clicking "Reset to Default" button on the Details Panel for the MaterialAttributeLayers material node.
UE - Rendering Architecture - Materials - Jul 15, 2025This crash repros from at least UE 5.3 and up to latest. The following assert is hit: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 1067] Array index out of bounds: 0 in ...
Merging negative-scaled actors breaks materials
UE - World Creation - Worldbuilding Tools - HLOD - Mar 27, 2018Materials are broken when merging a mesh with another that has negative scale Licencee states that bisMirrored in FMeshMergeHelpers::TransformRawMeshVertexData seems to be involved. Does not occur ...