What is the "double box" figure in the top right corner of the panel ?
"Copy" is what it looks like
When I click it, it says file operation progress with one file operation in progress.
There is another window on the left side small window that is expandable and empty?.
I will check mate system monitor and see if there are another explained processes.
I have been working for a few hour on a backup script that uses rsync and tar.
Some of the "rsync commands" has some mistakes which probably left some open files etc.
Those boxes went away on a re-login.
After using zip files for years, I was told that it does not retain file permissions.
Now I use tar files.
I replaced all cp statements with rsync even though may be some slight speed difference.