Game abandonment with no issues on my end?
I have never had that issue but depending on the device and its age try to shut it down give it a few minutes then restart it.
PC has all new parts, finished building it not long ago.
Wi-Fi is about 100+ mb/s, never experienced this issue until now.
Very infuriating loss considering I was up +3.1 according to stockfish.
If the game was auto-resigned the there was a connection issue between your client and the live server.
There are some things you can do to minimize connection issues in your end.
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