Unreal Engine Issues

Assertion fails when a struct is opened with a BP class reference stored and with that struct as a variable in the BP class that's referenced.

Assertion fails when a struct is opened with a class reference stored and with the struct as a variable in the class that's referenced. A restart is required in order to see this occur. Repro Rate: ...

Crash occurs while replacing a Widget Component with a user created Text Block

This is not a regression. Tested in //UE4/Release-4.27 CL18319896. The crash occurred. Crash occurs while replacing a Widget Component with a user created Text Block blueprint. ...

Curves in compressed additive animations interpolate incorrectly when two keys in a row have the same value

Curves compressed from additive animations will not interpolate correctly if they have two keys in a row with the same value. The second key will be ignored, leading to the curve interpolating earli ...

Possessing and Unpossessing a Pawn when using NetCulling causes the Client to lock up

In this test bench, they are using a APawn with a custom replicated Movement Component rather than using a ACharacter and they are getting a different result that ends up in a permanent softlock of ...

Disabling LQ lightmaps causes crash on mobile preview

Memory leak in Test build when moving ISM with UpdateInstanceTransform

This leak occurs in Test builds, but not in Development builds. Updating InstancedStaticMesh with UpdateInstancedTransform every frame causes a memory leak. This screenshot was taken using Mempr ...

'Quit Editor' Blueprint Node Crashes Editor

Using the Quit Editor blueprint node crashes the editor when used, instead of exiting cleanly. Closing the Content Browser prevents the crash from occurring, however. ...

When having two viewport panes open in editor, and piloting/unpiloting a camera actor in one pane, will cause the other pane to reset viewport camera orientation.

Piloting and "Un-piloting" a camera Actor in viewport pane causes other viewport panes to reset its view orientation upon "Un-piloting" of Camera Actor. ...

Linked Anim Graph in Post Process Anim BP does NOT work after remove ControlRig Track

After remove control rig track from the skeletal mesh, Linked Anim Graph in Post Process Anim BP of the SK Mesh does NOT work. This issue can be fixed by the following code.// add #include "Anima ...

Invalid Operand "WorldPartition" when calling FAutomationEditorCommonUtils::CreateNewMap();

LogAutomationController: Error: LogEditCondition: WorldSettings - EditCondition attempted to use an invalid operand "WorldPartition". ...