I rename various fields like instrument, composer, style etc. I thought it happened in all of them but now I'm not sure. I will go back and experiment and let you know what I come up with. Thanks for responding.
I tried renaming on artist and got the same problem. I think I know why you don't get it, you use the keyboard.
I use a right mouse button click to choose rename, type the new name and when the box drops down try to make a choice with the mouse (works if I get there quick enough-try moving the mouse around a bit--without clicking it--if the problem doesn't come up for you).
I did notice the problem doesn't come up if I use the down arrow key. However a different issue arises. If I go down one choice **too far, the box closes and the rename takes whatever letters I've typed as the new name.
**by too far I mean one past the last entry.