Logitech camera C920 not working on new Mac Mini M1

Just unboxed and setup MacMini M1.

Logitech camera (sometimes) lights up when Facetime is started, but not every time.

No image displayed in FT app.

Occasionally a message pops up on FT saying no camera input (sorry, not exact wording).

Followed recommendation to reboot. Still did not work.

Then, just as I am writing this, it started working. I have no idea why.

I looked at a few forums and several posts. I see that others are having (have had) the same issue with different results.

Would like to know if anyone has suggestion for drivers or software. Than you.