yes ! There are some bugs. its about 4 hours i'm using my mobile with android 11 and i found some bugs like camera app is lagging while zooming in & out and some are not supporting android 11 like GOOD LOCK we have to wait for new updates of applications.
on the other side I played game about 1h 30m . Mobile is consuming less battery and it's not heating like before. New features in gallery and in other app with one UI3 .
as me if you are found to explore new features as early then others then you can go for update otherwise stay on android 10 till it officially launched.