This only happened to me once, on 5/3/2023 my blitz rating was adjusted from 358 to 366.
Cheating in 1min bullet games even possible?

https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
https://www.chess.com/article/view/online-chess-cheating
Yes it's possible to cheat in bullet. However, discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums. If you want to discuss, join the following club: https://www.chess.com/club/cheating-forum
I was notified that I'd be getting some ratings back since one my opponents apparently cheated, I just don't understand how you could possibly have time to do ANYTHING besides shuffling the pieces. Actually I'm not even man that's just impressive if you manage to play and evaluate a bullet game on multipöe tabs at once, I don't know how players cheat I just assume it's the way I'm describing it.