client stops working or closes by itself

so recently ive had multiple issues with the lol client where it just closes by itself. It was annoying but not that big of a deal since i can log back in np. But just today the client stopped working in a middle of a ranked championselect and i had to close it making me lose a whole bunch of lp and not being able to play for 30min (just got plays.tv 2 makes me cri). I know im not the only one because a friend of mine was having issues with it too.