Hello, I've been having this issue for several months now along with several other people who have AMD gpus and dual monitors. When Ubuntu goes to sleep and then wakes back up again later, there is a stuck second cursor over top of the applications. Please see the bug report link below. I'd just like to try and get the right person's attention at AMD as this appears to only happen to AMD GPU users.
This is happening in Ubuntu 20.04.1 with all the latest updates installed.
I have a RX480 GPU and dual 144hz monitors.