Cmd, Opt, Ctr, Shift keys stuck or lagging

Hi,

I am using an M1 mac mini for a few months. My keyboard is a ~1 year old black Apple Magic Keyboard w/ Numpad. I’m also using a black Magic Trackpad and a Wacom Intuos Pro tablet with the latest firmware.

Since operating this setup, I am experiencing a tideous problem with the modifier keys (cmd, option, control, shift). They seem to work with a slight delay after pressed. And more important: in about half of cases, they do not register letting go of the keys.

For example, the OS acts as if ‚Cmd‘ is still pressed, even tough I only tapped it shortly and am not pressing any keys any longer. It only „resets“/releases the pressed state after I hit the key again. This is really annoying since most OS and app functions will be triggered as if a modifier key was pressed, even tough it is not.

I am quite positive that it is not a hardware issue, since the keyboard itself is in great shape, and it also occures with another Magic Keyboard I have. It occurs whether the keyboard is connected via BT or USB. It also occurs on a different blank new user account on the same machine.

Anyone else experience this and maybe have an idea on how to fix this?