Unreal Engine Issues
Unreal Engine Issues
Details Panel Bug - Multiple external objects of same type share expansion state
UE - Editor - Workflow Systems - Oct 5, 2023This is because expansion state is saved per class, and we are displaying multiple objects of the same class at the same type. The UniqueID we add when adding these objects via 'AddExternalObject' ...
Groom shadows stay visible when component is hidden
UE - Rendering Architecture - Jan 8, 2024This appears to happen with both Virtual Shadow Maps and Cascaded Shadow Maps. ...
Unable to input Chinese characters (Microsoft Pinyin) after inputting 34 half-width characters
UE - Editor - UI Systems - Slate - May 2, 2024If we enter Chinese characters using Microsoft Pinyin after entering 34 or more half-width characters in a text field, they are not reflected in the box. If less than 34 characters are entered, Chin ...
Logic error in TRange::Difference causes crash when you Trim and Preserve Left/Right and unbounded Attach section in the sequencer
UE - Anim - Sequencer - Aug 1, 2024TRange::Difference function does not handle bounds correctly, causes crash in the sequencer when "Trim And Preserve Left/Right" is used in the user's example project. User provided a potential fix: ...
Assert in MoviewPipelinePIEExecutor when cancelling movie scenes during rendering
UE - Anim - Sequencer - MRQ - Sep 11, 2024When rendering a single Level Sequence with MRQ, removing the Level Sequence that is actively rendering will create an array out of bounds exception. Also confirmed in //UE5/Main, CL: 36086643 ...
Widget Flickering Observed in RetainerBox with Incorrect LayerId
UE - Editor - UI Systems - UMG - Nov 19, 2024Setting the Phase Count of a RetainerBox to 2 or more may cause other widgets within the same UserWidget to flicker. Upon investigation, we found that during frames where the flickering occurs, the ...
Inside the ViewportToolBar, the "Click to Expand" ComboButton works incorrectly with Display Scaling
UE - Editor - Applied Usability - Mar 12, 2025When Display Scaling is applied (e.g., 125%) and the Level Viewport is resized, the ComboButton in the SViewportToolBar does not behave as expected. Normally, the ComboButton hides when there is in ...
Editor crash when using PCG self pruning and complex collision
UE - World Creation - Procedural Tools - PCG Workflow - May 14, 2025While testing out pruning points based on collision, it was observed by the licensee that using complex collision seems to crash the editor. The editor crashes with the following error: ``` Asserti ...
Unwanted offset on curves when importing animation assets
UE - Editor - Content Pipeline - FBX - Jun 27, 2025Hello, We seem to have encountered some unwanted behaviour when importing certain curves from our animation fbx assets into Unreal. Some of these curves don't have keys from the very first frame, b ...
AddActorWorldOffset offsets character blueprints faster than other actors
UE - Gameplay - Feb 22, 2016AddActorWorldOffset offsets character blueprints faster than other actors when the character is possessed or anytime after possession/ejection has occurred. ...