Playing sandbox a moment before finding a match can result in a temporary ban.

[Zaiat]

As title states, queuing up for a match then going into sandbox could lead to what I think is failure to connect, what happened to me is I saw a joining match notification a moment before I got into sandbox, when I left sandbox the game was in idle main menu, I queued up again, found a match within a second but when I was done with that match I noticed I was temporarily banned (My assumption is that I had a slot reserved in two servers, matching making never routed me to the first one when I queued nor showed me a reconnect button and instead found me a new match). I think disabling sandbox the moment the client receives a match found message would be a good temporary solution.