Sorry if this has been posted, don't really know how else to word it correctly if someone else has had this issue.
Also don't know if it's repeatable, since I can't force repeat it as you will see:
Press "Enter Hero Selection"
While loading seleciton screen but before screen change, another player drops.
Click button to get rid of notification.
On return to Main Menu, top menu bar is missing. It did not reload with the UI. Only fix is to restart the game.
© 2014 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.