I've seen firsthand making a move in a game, the server gets it, knight moves to D5 or whatever, my Wi-Fi drops for about 3 seconds and then "Game abandoned" triggers, I don't have time to reconnect before the game is thrown away. This all happens in live time so i know its not just lag, the game servers have no patience at all before determining that I have rage quit.
There's less time to reconnect on the first 10 moves. However, a move in the board does not necessarily mean you're connected and the server received your move. The client will show the move, even if you're not connected.
https://support.chess.com/en/articles/8652402-how-can-i-optimize-my-online-chess-performance
https://support.chess.com/en/articles/8584209-how-do-i-fix-my-disconnect-lag-issues
I've seen firsthand making a move in a game, the server gets it, knight moves to D5 or whatever, my Wi-Fi drops for about 3 seconds and then "Game abandoned" triggers, I don't have time to reconnect before the game is thrown away. This all happens in live time so i know its not just lag, the game servers have no patience at all before determining that I have rage quit.