Hi Geed thanks for posting this.
So to be clear, if you move the folder icon outside of a Fence this does not occur? (Or from troubleshooting, steps, sound like it does regardless of where it in on desktop?)
Sounds like you've tried turning Fences off with the "Enable Fences" checkbox, and it still happens when disabled?

Similar question – if you disable Fences, and then log off and back on, does it occur then?
There's a difference between disabling it while running, and disabling it then restarting, so it gives information to know whether there's a difference between the two.
We don't have guesses yet as to why this is occuring – but would like to get to the bottom of it for sure