Sudden mouse stuttering doesn't go away until you make an erroneous move.

I've been struggling to find similar issues via googling around, but I've noticed that sometimes when a position is hanging in the balance during a close game my mouse stops working. It's so peculiar that I can only assume it's software induced latency of some sort.

It has never occurred to me while I'm losing. It has only occurred while a position is even or I'm winning. Oftentimes my mouse will jump around the screen for long chunks at a time, moving seemingly on its own/making it's own plays like shuffling one of my pieces back and forth or very obviously blundering a piece. Yet, I constantly have my Activity Monitor up on my computer and notice no strange jump in % CPU, Memory, Energy, Disk, or Network usage which leads me to believe it isn't a problem on my computer's end. Again, this only ever happens in specific scenarios.

In the latest game this occurred to me, my rook simply swapped back and forth to give my opponent several free moves and then voila, the latency disappeared.

It feels useless to report games as I have no proof after the fact of the strange behavior, unless chess.com logs every move of every game forever, which is doubtful as that would be an incredible amount of data. And plus, how could they tell I wasn't just moving a piece back and forth or simply blundering?

I tried a number of times to record a video of games where this occurred, but as you can imagine, since this only seems to happen during games I'm winning against begrudging, disgruntled would-be cheaters, it is hard to capture on film — unless I were to record every one of my games for an extended period of time, which I might have to do from hereon out if there's no other way to resolve this.

Has anyone else faced such issues in live games?

i have. its like suddenly i cannot control my mouse pad (i use a laptop) and i have to wait about 10-15 seconds until i get control of the mouse again. and yes, it only seems to happen in games i am winning. it happens so often i always block the player i am playing when it happens. i also make a cheating report because my mouse does not mess up like that any other time while using my laptop for anything else. clearly there is some sort of quirk the other player can use to manipulate more winning chances in the game. it used to anger me but i just block block block. it feels like a real ripoff.