I'm on Ubuntu 20.04, using the nvidia-driver-440, and I am also experiencing wallpaper corruption issues whenever I unlock my desktop.
My current workaround is to do
sudo apt install --reinstall ubuntu-wallpapers
This restores the picture, but eventually it gets corrupted again.
I previously also saw some corruption in the top bar and in the dock icons, but this seems to have cleared up.
I'm on Ubuntu 20.04, using the nvidia-driver-440, and I am also experiencing wallpaper corruption issues whenever I unlock my desktop.
My current workaround is to do
sudo apt install --reinstall ubuntu-wallpapers
This restores the picture, but eventually it gets corrupted again.
I previously also saw some corruption in the top bar and in the dock icons, but this seems to have cleared up.