Only on Dominion though. No problem at TT or SR. It randomly disappears almost on every game. Occasionally it reappears again, only to disappear again sometimes. It still persists after the game finished, and I have to put my laptop to sleep to restore it. Already experienced this for months.

Same happens to me, its really frustrating

This thread might put you in the right direction - http://na.leagueoflegends.com/board/....php?t=1747083

It could possibly be a driver issue if you use ATI Radeon cards. Its been an issue for a long time, so many something in that thread will prove to be of use. GL