So this has never happened to me before.

Basically i was stuck in loading screen for 8 minutes at 100%, the new music that plays when you enter the rift was playing. The game eventually gave the the disconnect message (It will usually tell me if i dced if i switch tabs a couple of times within 3 minutes) and then i was aloud to loafd back in. The **wierd thing is that my teammates could not remake ** even though i wasn't in the game. The game told me I had leaver behaviors because of this.. I ended up coming back and immediately killing my lanee 4 levels head of me but it didnt matter because my lane had been fed somehow. My top rage quit eventually.