Ranked froze

I just went to play a ranked game and when i clicked on accept instead of getting to Champion select the place in the window where the selection was supposed to be was black(chat and everything else seemed to work). Now after a while the game kicked me and i got a 1:20 minute low priority queue. Because this was ranked I fear this cost me some lp (I'm 0 lp Silver V) so I kindly request this to be taken off of my record.