Cannot leave finished game [CLIENT]

A game of ARAM finished, clicked continue, overlay closed, client popped up and informed connection to pvp.net servers had timed out. Clicked skip waiting for stats after dismissing warning. Attempted to join new lobby, informed could not due to still being in another session. Closed and reopened LoL client, Game Abandoned popup keeps coming up, attempting to reconnect hangs at an unresponsive black screen. Has persisted for over 15 minutes, session on server doesn't seem to have ended properly :(

Don't know how to reproduce issue and don't have screenshots or video.

Thanks.