Disconnect at game start - Impossible to reconnect

It's basically in the title. Client connection works fine, match is still in progress according to client except I can't reconnect to it > Unable to connect to the server. Please check your network connection and attempt to reconnect to your game. Network is indeed fine, since I'm posting to the board at this exact moment. I played a game before this one and it worked fine. Game took a long time to load with one late player. It felt much like the issue we had a few years ago (or so) when there were idiots DoS'ing the game servers to dodge the game they didn't like. I hope this gets investigated and solved. I'll gladly provide any additionnal info (Log files, etc).
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