x-key (Stop playback) behaviour.

Why does the x-key on the keyboard behave differently on fullscreen playback and windowed playback ?

With fullscreen movie or trailer :

• The movieinformation screen is closed
• The trailer or movie playback starts in fullscreen
  

Hitting the x-key to stop playback behaves like this :

• stops the video
• removes the video from the player
• returns to the screen that was displayed prior to the movieinformation screen (because it was removed just before playback started)
  

With windowed movie or trailer :

New xml file custom_1190-Trailer.xml :

• The movieinformation screen is NOT closed
• The trailer or movie playback starts windowed in the videowindow control (overlayed over the movieinformation screen)
  

Hitting the x-key to stop playback behaves like this :

• stops the video
• removes the video from the player
• hides the group control containing the videowindow control
• the custom dialog window (1190) is now completely transparant and the movieinformation window is fully visible (not covered/overlayed by anything)
• the buttons and keys of the movieinformation screen are inaccessible
• does NOT return to the movieinformation screen. The custom window (1190) is still active (skin.ToggleDebug confirms this)
• the Esc-key, Backspace-key, or right-click of mouse is required to return to the movieinformation screen and gain control over its buttons and keys
  

Why ?

EDIT: Everything else works as expected just not the x-key on the windowed screen.