I'm on Ubuntu Mate 20.04.03, Kernel 5.4.0-91.
Sorry if this post is a duplicate, I know that this problem has been discussed before, this bug exist from 18.04 and maybe before, but I see that has never been fixed.
I can't find a way to replicate the problem, but I know that sometimes it's impossible to rename files or folders staying in a folder. I have to extract the object from the folder to the desktop, rename and move back to the folder.
Why?
There will be a fix?
I'm also on 20.04 and I have encountered the same problem.
This problem only (but always) happens if the number of files in the folder (that is: icons in the window) exactly fit the window size.
If you resize the window you'll see that the problem disappears.
(that is also the workaround I use)
Please add your 'this bug affects me too' to the bugreport here:
And also here:
It is one of the strangest bugs I've ever encountered
but at least I can use this workaround so it bothers me not too much anymore.