Crash in Champ Select [CLIENT]

This doesn't occur regularly and therefore I'm unsure as to how to reproduce it. It also occurs at different points during the champion selection process. Recently it occurred when I went to select a champion. The error said that the Client had timed out. I couldn't select a champion, but I could choose my runes and masteries still. It would not let me choose my spells though. This Client crash has also occurred after I selected my champion as well, but still in the champion selection screen. Twice I have had to exit the game during champion select, get punished for leaving (about 10 LP so far), open League again and if I selected a champion, have to wait to let the game load and if not, have to start the match making process all over again. Either way, I'm experiencing Client crashes during champion selection, but cannot predict when it will strike next, nor when during champion selection it will strike. I do get an error every time though as well as an LP loss. It does only seem to occur during ranked champion selection for 5v5 in solo que.