Unreal Engine Issues

StartCameraFade() breaks on mobile projects after editor is closed/reopened

If a project that is set to Mobile/Tablet and Scalable 3D or 2D uses StartCameraFade() to produce a fade in effect, the effect will not play in PIE if the editor is closed/reopened. ...

Physics Constraint Component loss of accuracy

Physics Constraint Component has lost accuracy between Unreal versions 5.2 and 5.4 (and up). When measuring the exact distance between rigid bodies constrained by a Physics Constraint Component, the ...

Difference in LODs between PIE and editor

It is possible to repo this without the exact steps, but that leaves it ambiguous if the camera moved when exiting PIE or not. ...

Landscape Layer Masks can't be imported

Repro Rate: 3/3 This is a live issue that has been tested to occur in //UE5/Release-5.1 at CL 23058290. This is also confirmed to not be a regression since this issue also occurs in //UE5/Release- ...

Assertion with Geometry Collection when play in simulate mode

Error message:Assertion failed: !HasAttribute(Name, Group) [File:D:\CHAOS\Engine\Source\Runtime\Experimental\Chaos\Public\GeometryCollection/ManagedArrayCollection.h] [Line: 121] ...

Dynamic skylight doesn't apply to StaticMeshes

Overriding MacroUV causes stretching Material

While working on an issue for a user using MacroUVs, I noticed that entering any value into the Required Module with Override Default Macro UV toggled true will cause the Material to stretch and dis ...

Reparenting a UserWidget within that widget's events can break links between UWidgets and their SWidget.

Reparenting a widget within it's own event can cause that widget's tree to have null references instead of references to slate widgets. This happens because when a widget is reparented, we remove a ...

Variant Thumbnails are washed out

I think somewhere in Thumbnail Generator::Generate Thumbnail FromTexture() is applying this washout. ...

Crash when widget is replaced and no longer valid