I was well connected and I started to chat because he was taking much time, he asked me for a draw, then he blocked his time blocking my moves.
Your opponent can't impact your connection to the server. It sounds like you just had a normal disconnection.
https://support.chess.com/article/4720-online-chess-performance-optimizations
I was well connected and I started to chat because he was taking much time, he asked me for a draw, then he blocked his time blocking my moves.