Error when joining a Horde Match

Never happened until October update. Once in a while it happens when trying to join a hosted Horde match.

Havent seen this yet but last night the TU1 update seemed to knock out most matchmaking for me (UK). Horde lobbies would load in with one or two people and then never get back filled, Even some private lobbies were struggling to load everyone in. Escape matches taking up to 5 minutes to find a lobby (really?). I know matchmaking has been an issue for many in Euope (cough, ranked) but this amateur half hour is a new one