This came up recently with another user. Rebuilding preferences/cache took care of it.
Scroll down to Restore all preferences and default settings on this page:
This is the same result as version 15. Nothing has changed since the restore.
tried resetting the settings
Tell us exactly what you did. Did you use the keyboard shortcut, or you actually delete (or rename—a safer option) all of the files in the table?
I tried both options. First delete the files and in the second attempt a keyboard shortcut.