Please also try:
1. sudo apt install gnome-session
2. Log out and then into "GNOME" or "GNOME on Xorg".
3. Now the desktop-icons extension is gone, do you see the same problems?
Please also try:
1. sudo apt install gnome-session
2. Log out and then into "GNOME" or "GNOME on Xorg".
3. Now the desktop-icons extension is gone, do you see the same problems?