I tend to get connection time out, regardless of device. I've tested it on 4G (mobile) and on WiFi. It was, much, much better before.
Why not try a wired connection?
I've never had a problem with a wired connection.
Therefore, I conclude that your 4G and wifi connections are the problem, not the chess.com server.
If it was the chess.com server, disconnection should have happened to me at least occasionally.
I tend to get connection time out, regardless of device. I've tested it on 4G (mobile) and on WiFi. It was, much, much better before.