I did not have this issue in 18.04 but now that I have upgraded to 20.04.01 (Ubuntu-studio) I now have it and it is really annoying. I did not know how to work around it so had to reboot my machine. Fortunately this thread has given me a couple of things to try now.
Interestingly, the login background had the xbuntu background showing and the password box would not accept any text although it KNEW if the caps lock key was pressed as it gave a warning. The login screen was completely different to the usual one after reboot.
I did not have this issue in 18.04 but now that I have upgraded to 20.04.01 (Ubuntu-studio) I now have it and it is really annoying. I did not know how to work around it so had to reboot my machine. Fortunately this thread has given me a couple of things to try now.
Interestingly, the login background had the xbuntu background showing and the password box would not accept any text although it KNEW if the caps lock key was pressed as it gave a warning. The login screen was completely different to the usual one after reboot.