Hi there
I am not sure if that was the intention but if you choose "Overlay" or "Hud.Menu" at this option:

Parent UI Layer (Overlay, Hud.Menu, Hud, Under)": "Under",

you can't click on the top items in your own vending machine (if you click on "administrate" and want to delete your selling items on the top).

Yeah, those are Rust client layers that we get access to. I don't have control over what happens if you use them. Just wanted to provide the option to players who want that level of control.

Aaaah alright. I didn't know what it was XD but with thee option "Under" everything is fine. :-)