[Solved] Trouble Renaming Files & Folders

[bc-os]

For some reason I cannot rename files or folders via the GUI in a handful of directories. I'm trying to work on some of my C libraries. I go to:
~/Cthings/mylibs
and in that folder I cannot rename any files or folders. Pressing F2 does nothing. Right-clicking and choosing "Rename" does nothing. (The click is valid. The menu option is not grayed-out or anything. It just has no effect.)

Then I created another folder:
~/Cthings/mytest

I copied one file from 'mylibs' to 'mytest': abcid3.h
In 'mytest' I was able to rename 'abcid3.h'. I figured something might be wrong with the 'mylibs' folder, so I deleted the 'abcid3.h' file from 'mytest' then went back to 'mylibs', did Ctrl+A, Ctrl+C and pasted all of them into 'mytest' and tried to rename some files. I lost the ability to rename again... Weird. I'm able to rename if I move or copy one file at a time. Also weird, I can open or delete any files, just not rename.

I wondered if there was something off with file permissions. I opened a terminal to check. All of my sources and other files have 755 permissions. While in the terminal, I thought I would try (in the directory ~/Cthings/mylibs):
mv abcid3.h abcfoo
And sure enough it was renamed successfully. I saw the GUI window update accordingly. Any idea what is going on?

[all41]

Which file manager?
Always include as much info as possible. See this link:
http://forums.linuxmint.com/viewtopic.php?f=17&t=83444

[bc-os]

Would it be Nautilus or Caja? (I don't really know what the difference between these two are.)
I'm running Mint 20.1, MATE desktop.

[all41]

Read through the replies on this topic:
viewtopic.php?f=206&t=296934&hilit=caja
Does this seem to describe the problem?

[motoryzen]

Would it be Nautilus or Caja? (I don't really know what the difference between these two are.)
I'm running Mint 20.1, MATE desktop.

Nautilus = Gnome
Caja = Mate
Xfce = Thunar

[bc-os]

Read through the replies on this topic:
viewtopic.php?f=206&t=296934&hilit=caja
Does this seem to describe the problem?

That describes it perfectly. I resized the window to get rid of the vertical scrollbar and I was able to rename.
It seems to happen when there's only approximately half-an-icon's worth of scroll room.

(Also, FWIW, I did search the forums looking for a solution before posting. But I had no idea Caja was the culprit, so all I could think to search for was "can't rename" or "cannot rename". I got 1,906 results which was too overwhelming to sift through. My apologies if this is a redundant post.)