Key Editor (no focus, or does not appear)

If I click on a MIDI segment on an instrument track, sometimes or most of the time the Key Editor does not appear, or if it does, its in the background, buried under another window. The focus is still on the main window and not the Key Editor window which should move to the front. After a series of other clicks, and such the Key Editor will appear when double clicking on the MIDI part/segment, but I can not determine a sequence that gets it to appear.

Has anybody else come across this?