Unreal Engine Issues
Unreal Engine Issues
DrawDebugString display wrong position in PIE when changed display scale
Tools - Sep 16, 2020The display position of the text in DrawDebugString is affected by the scale of the display. Should refer to the Project() of DebugCanvas (not Canvas). - Suggest Code void AHUD::DrawDebugTextL ...
TInstancedStruct used in native actor class loses reference to Instanced UObject after BP recompilation
UE - Foundation - Jun 25, 2025When a TInstancedStruct contains a UObject marked with EditInlineNew and DefaultToInstanced, the reference is lost after compiling the Blueprint but only when the struct is part of a native Actor cl ...
Edits of node properties that are not stored on pins do not diff correctly
UE - Gameplay - Blueprint Editor - Oct 2, 2015Currently details changes to the following are not noticed by the Diff tool when diffing AnimBPs:State Machines (i.e. Max transitions per frame)Transition rulesConduitsStates This also affects non- ...
X axis rotation only follows relative rotation
UE - Gameplay - Apr 10, 2017A user is reporting that the X axis rotation appears to only rotate based on the object's relative rotation, and not rotate based on the world rotation, even when using Set world rotation. For test ...
Crash while scrolling through language options in Packaging settings
Tools - Jul 21, 2017This is a trending crash in the 4.17 preview. This is a regression Broken: 4.17.0-3528061 Worked: 4.16.2-3514769 User Descriptionsproject/settings/intern..language. Crashed it just by scrolling t ...
UForceFeedbackEffect is only making slight vibration in iOS when value rises from 0 or effect is started.
UE - Platform - Mobile - Jun 11, 2019UForceFeedback is expected to give vibration just like in the graph of the asset. But only in iOS it is not. It is expected to give continuous vibration following the forcefeedback asset, but only ...
Default UE splash logo appears briefly when launching an application with an alternate launch image on iOS
UE - Platform - Mobile - Sep 15, 2020Various users have reported seeing the default UE splash logo appear briefly before their custom launch screen appears. This was reported to have been seen in 4.25, and did not occur for users in 4. ...
Invalid Subsurface Scattering Color when using Per Pixel Shading Model and non-default material layers
UE - Graphics Features - Sep 27, 2022It appears as though when adding material layers to a material instance that uses the FromExpression shading model, the subsurface color ends up white. If you add a DebugFloat3Values and output it t ...
Scalebox scaling won't update if child size changes with global invalidation enabled
UE - Editor - UI Systems - Slate - Jul 17, 2024When global invalidation is enabled, Scale Boxes don't react properly to changes in the size of their contents. Licensees have worked around this by updating SScaleBox::OnArrangeChildren:// This sca ...
RENDERING: Unchecking Actor Hidden in Game for Actors is not letting them be visible in game
UE - Graphics Features - Jun 19, 2014CHANGELIST: 2107728 BRANCH: UE4 DESCRIPTION: Unchecking the Actor Hidden in Game checkbox is not allowing a Note or an Ambient Sound be visible when played in the editor QA REGRESSION? NO ...