A few days ago I upgraded from 20.10 to 21.04. Since then Copy-paste sometimes(!) does not work.
It seemed random, but after some experimentation I think it is when I try to copy from Firefox to some other application. (The other application can be Chrome, VSCode, the terminal). The other application freezes for a few seconds and the paste does not work. However I can paste back to Firefox. Even more strangely, sometimes I can copy from Firefox to other applications as well.
Any idea what's going on?
sudo apt-get install firefox
firefox is already the newest version (88.0.1+build1-0ubuntu0.21.04.2).
