Windows 11 magnifier broken

Randomly you launch the magnifier, and immediately your PC slows to a crawl, almost frozen, can't move the mouse, it only updates its position once every three or four seconds.

Then after about twenty seconds, the PC goes back to normal, except the magnifier will not launch at all, even through settings, the button does nothing.

It persist with a reboot - If you try to launch the magnifier, it happens again.

this problem occurs with all nvidia driver updates since Feb this year.