This was the last message before the server was disconnected entirely. Sometimes it recovers, and the game continues as normal. No players (with a good connection in general) report server lag, yet it will lose connection with the matching server and it disconnects everyone. This is what it appears anyway.55236.030 Info MatchingServerGameUpdater.cpp:142: Failed to sendHeartbeat to the multiplayer matching server: Downloading failed: Timeout was reached -- Operation too slow. Less than 1 bytes/sec transferred the last 20 seconds
This did not start happening until 14.9.