I think there is a bug wit the Selection Tags element. When I redesign the element on deskopt version lets say the default element is blue and I change it to black, on the mobile version it stays blue with no change at all and I dont have any design option on mobile version. also when I set the tabs element to disable(), the editor no longer let me select the element, I have to use the tools then layers then highlight the element in order for me to select it again.
Perhaps you are right and this is indeed a Selection Tags bug. If you can't fix the problem, it's best to ask the backend developers https://factordedicatedteams.com/dedicated-backend-development-team/