Empty Window in UE 4.4.1


from time to time it happens that I get an empty window which will act as the main window (even though another window of the level editor is open at the same time). This window is not movable, but sizable.

I attached a screen shot to show what I mean.

This is annoying since it takes screen space and I can’t minimize it since it will minimize my level editor window as well. The only way to reset it is to delete my EditorLayout.ini, but then I have to reconfigure my editor again.

Unfortunately I have no idea what causes this empty window to pop up.

I also attached my buggy layout file for you to have a look at it. Hope this helps.
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Thanks for the report. This is a known issue that has been addressed internally and will have a fix implemented in a future release of the engine.