Two days in a row playing the multiplayer (on 360) I have run into a insane bug while playing a Vanguard where my biotic charge pushes me through the collision system so I end up walking in the air. Eventually it gets so confused about me being outside of the games collision detection that I fall through the world with no way of getting back into the level. Falling forever until the match ends. Even if I die in mid air while falling (a cerberus sniper shoots me somehow), the next round I just stand up and start falling again. Also Multiple times peoples guns keep showing the shoot animation while they are not shooting.
So anyone else encounter this or any other weird ass bugs in ME3?