So just earlier today with my NE european account (Deltamon), I played a dominion game with Akali and middle of the game got randomly disconnected and then got option if I wanted to reconnect.. Well after I reconnected everything else worked normally but I couldn't see enemy Morgana (she had a Blade Mistress skin if that could be the cause) and Kog'maw.. And this made playing against them completely impossible..

Also I had strange bug other day aswell, where one of the capture points (south east one) was suddenly slightly offposition to the right.. It worked normally but you had to capture it from that dislocated position which might possibly give some issues with the creeps capturing it.. I have no idea what caused it however, it just suddenly was like that when I went there (it wasn't bugged from the start)