Crash on Unreal Editor Exit due to subclass of UEditorUtilitySubsystem

UE - Editor - UI Systems - UMG - Jun 18, 2024

Since UE5.4, it has been reported that if there's a class derived from UEditorUtilitySubsystem, the program crashes when the editor exits. This is because the code added in CL30853505 accesses freed ...

UMG: crash when a namedslot has content in a widget blueprint and its instance

UE - Editor - UI Systems - UMG - Jun 17, 2024

workaround: open WBP_A and remove its namedslot content to avoid having two contents in the same namedslot. ...

Widgets will bind input delegates to the Player Controller's Input Component, but never unbind them

UE - Editor - UI Systems - UMG - Jan 30, 2024

This is a bug introduced with 18468289 a while ago. We added this functionality for [Link Removed], which allows input event nodes to be placed within widgets and have them behave correctly.  This ...

Error with variable during blueprint compile when selecting and deselecting widget name in UMG

UE - Editor - UI Systems - UMG - Jan 29, 2024

Selecting/deselecting the name of the widget on the UMG Designer will detect bleuprint changes. If compile blueprint at this time, it will output an error "due to old pin". The widget name has not a ...

UMG Animation MPC track cannot preview

UE - Editor - UI Systems - UMG - Jan 23, 2024

The reason should be in FMaterialShader::GetParameterCollectionBuffer , Scene is nullptr and cached value GDefaultMaterialParameterCollectionInstances ** doesn't update. ...

The UI layer system in Lyra leaks widgets when changing level

UE - Editor - UI Systems - UMG - Jan 12, 2024

Detect OnHovered event in child widgets even if HitTest(Self/Child) is disabled in RetainerBox

UE - Editor - UI Systems - UMG - Jan 11, 2024

When HitTest(Self/Child) is disabled in RetainerBox, the child widget is assumed to not fire all hit test events. However, in this case, the hit test event is fired in the child widget. This is an i ...

Mouse lock on a widget in the RetainerBox is misaligned and locked in the wrong position in the standalone/package application

UE - Editor - UI Systems - UMG - Jan 9, 2024

Locking the mouse to a widget covered by a Retainerbox locks it in a different position in the standalone/packaging application than in PIE.  This does not happen if RetainerBox is disabled and the ...

Cannot set background color for UI Domain material preview

UE - Editor - UI Systems - UMG - Dec 18, 2023