You were disconnected from the Live server process. That's why your screen did that. That is why you lost.
https://support.chess.com/customer/en/portal/articles/1444918-my-internet-connection-is-fine---why-am-i-getting-disconnects-
https://www.chess.com/blog/News/how-to-adjust-your-live-chess-connection
TO WWW.CHESS COM. I MUST TO STRONGLY PROTEST AGAINST THE DISCONNECTION OF THE PARTY FOR THE EASY VICTORY AS MY CHESS PARTNER crisantomartin OF SPAIN PERFORMS. AFTER THE DISCONNECTION OF THE PARTY WHEN crisantomartin INTERRUPT HIMSELVE I SAW THE WHITE SCREEN WITH THE WEAK CHESSBOARD VISION. AFTER TEN MINUTES I READ THE EFFECT OF THIS KIND OF DISCONNECTION : crisantomartin +8 and me -8. PLEASE CHECK IT AND DISSOLVE THE EFFECT OF THIS ABNORMAL PARTY.