Same here, I recently matched in puzzle battle getting 70 +, even. before the timer started for the match she/he was already at 25 wins, very suspicious, check the leaderboard in puzzle battle, she is the highest score 65k in a day at the time of typing this , higher than any player on there by an immeasurable amount.
I reported the account, I've watched many other players like GM puzzle battle and do not get to that point of speed.
The name of the account is "notsojane".
I recently saw a user named "notsojane" playing puzzle battle so fast!
He/She was completing 70+ puzzles in under 3 minutes! The problem is the leaderboard comprises of puzzle record solved in 3 minuted just over 60, maximum 64.
This user joined today (17th July 2023) and now has (currently at the time of this post) 57k+ points already!?
I am not spreading any hate, you can go spectate the user's matches if you doubt me.
One of the matches- https://www.chess.com/puzzles/battle/2baiEnsSE (I know some of you can't open it but still)