I've run into lots of little bugs.
Sometimes, clicking the icon of an (already running) application in the dock does not restore the window. To work around this, I restore and minimize a different window, which somehow resets something in the dock, getting it working again.
Sometimes, opening the calendar widget in the bottom right-hand corner doesn't bring up the entire calendar.
A lot of things, such as the search button, often take a long time to display (anywhere from 3-10 seconds), causing me to click again.
My keyboard repeat rate keeps getting reset.
Somehow, Windows got stuck in some kind of infinite notification loop, and I kept getting Office 365 advertisements in my notifications nonstop. I had to turn off notifications.
This is just a small sample... I've run into at least another one or two dozen bugs.
None are show-stoppers, and I still use Windows 11 on my work and personal computers, but Windows 11 seems pretty buggy. And an incredible memory hog. 8 GiB RAM no longer really seems adequate, ugh.