I don't know if you remember this, but over at AGO for a while a guy was posting who was a chemist at a detailing product blender in the UK, who along with some testing from SwanicYouth, kind of "proved" that Dawn and a lot of other things can "clog" (at that time) waxes and sealants, and make it seem that they are gone because the beading is flat. I have the threads bookmarked but of course they aren't working now, but the chemist had a hood with sealant on it, which was beading, washed it with some sort of dish detergent, it was flat, IPA-wiped, beading came back.
He said he knew that a good sealant was impossible to remove with dish soap because when they would clean the mixing vats at the blender, they had to scrub with toluene or xylene to get the sealant residue off. Whether the Dawn surfactants will clog a coating, I don't know.
PS The whole thing threw a new light on the idea that you could get a "virgin" surface to try a new LSP by washing with Dawn, when likely your new LSP was going down on top of a layer of Dawn sheeting surfactants (to keep from getting water spots on your dishes), which was attached to your old LSP.