@carmar , I fixed it.
First, open dconf-editor and navigate to /org/nemo/desktop > ignored-desktop-handlers
Choose Custom value.
In mine, I already have conky added. You need to add 'xfdesktop' to this. If you have no conky and no other ignored handlers, it would like like
On mine, because I have conky (This is for others that have other ignored handlers), it looks like
Apply and exit.
Now, open xfce4-settings-manager (Settings in Zorinmenu-lite app menu) and > Desktop Settings and then Icons. For
icon type select
Back out to the Main Settings. Go down to System > Session and Startup > Application autostart and click the
add button. Enter just
nemo-desktop in all fields to make it easy. Or you can make your own name and comment...
But command is
Once done, Log out and in and enjoy the problem being gone.