I can assure you that it happens…and often. The only other thing I can think of that I've done differently is transfer this file between myself and another person: but they cannot unlink either.
As for your demonstration, I'm afraid pictures speak louder than words here. I also deleted a file, as you can see and no change. It should be obvious that it does not work and this same issue has existed for at least the last two previous versions. Peruse the forums yourself—you'll see that there are no solutions.
