Unreal Engine Issues
Unreal Engine Issues
Renaming a function for a text block and switching tabs will cause editor to crash
Tools - Oct 28, 2014If you place a text block into UMG and then click on bind for the text in that text block (in the details panel) it will make a function. If you rename said function and then click the designer tab ...
InvariantLeft and InvariantRight justification mispositions wrapped multi-line text
UE - AI Workflows - UI Systems - Feb 26, 2026When a UMG Text widget is set to Auto Wrap and uses InvariantLeft or InvariantRight, the wrapped visual lines are positioned differently than expected compared to Left/Right. In the current engine ...
Pressing ESC while on a drag operation makes drag visual to be disappeared and OnDragCancelled not to be called.
UE - Editor - UI Systems - Dec 11, 2018DragDropOperation is removed when pressing esc button. but this is skipping OnDragCancelled so it can disrupt user's UMG drag operation logic. ...
[CrashReport] UE4Editor_UMG!TBaseDelegate<FMargin>::operator=() [delegatesignatureimpl.inl:381]
UE - Editor - UI Systems - Aug 29, 2017This is a longstanding and common UMG crash that has affected more than 200 users since at least the 4.15 release. User DescriptionsI was working in the UI and undid several last changes in quick s ...
[CrashReport] Assertion failed: !PinRef->bWasTrashed | UEdGraphPin::SerializePin()
UE - Gameplay - Blueprint - Aug 29, 2017This is a common and longstanding crash that has occurred since at least 4.15 and affected nearly 500 users. The CrashGroup was previously linked to [Link Removed], but that had specific repro step ...
Draw as border is completely opaque when size in negative
UE - Editor - UI Systems - Feb 26, 2019When an image widget is set to draw as border it will no longer render as a border if the size is negative. The widget appears completely opaque. ...
Cannot Scroll down to events with advanced options expanded
UE - Editor - UI Systems - Slate - May 31, 2017When using UMG and enabling advanced options then deselecting and reselecting the asset can cause issues with the scrollbar length and cause some options to be initially cut off. The scrollbar then ...
Object Mixer shows actors the World Outliner hides (5.8 is incompatible with 5.7-and-earlier behavior)
UE - CAPT - Tools - Aug 25, 2026For the same project and the same filter, Object Mixer returns a different set of actors on 5.8 than it does on 5.7. Actors that the World Outliner hides now appear in the Object Mixer list. Editor ...
WebBrowser SetVisibility not working on Android & iOS
UE - Platform - Mobile - May 29, 2018SetVisibility not working with Web Browser Widget on mobile devices ...
UV Offset Effect Material in RetainerBox Causes Visual Artifacts in Editor Preview
UE - AI Workflows - UI Systems - UMG - Apr 22, 2025When a UV Offset is applied in a RetainerBox effect material, visual artifacts appear only in the editor — not at runtime — if a widget with a dotted preview outline (like CanvasPanel) is placed dir ...