Montclair 5v5 rush no longer synced

I get like 15 secs into a game of 5v5, but then I get An error occurred and I am no longer synced with the match. Does not happen for any other type of match, 2v2 or 1v1 or Drop-in or normal Rush have been tested. Just the Montclair 5v5 Rush game. Has been happening for the last 3 days at least. After clicking OK on the error message, My avatar is not visible when I return to the grounds, although I seem to be able to move around and kick balls, My avatar does appear after about a minute though.
Playing on PC