Activate Outputs window will not go away

If I activate VST outputs using the right zone with the zone window narrow, the outputs dialog box will not go away. It is all OK if the zone window is wider, it seems if you can see 6 quick controls it will work, but if you can only see 4 quick controls, then the windows is too narrow, and the activate outputs window will not go away.

attached picture shows it stuck on the screen
Cubase Activate Outputs.jpg