Doing some testing with 8.940 — seems there is still some movements. I did several reloads with just the addon and it seemed to never budge. When I enable Elvui it starts to adjust again.
Even manually setting the Elvui scale to .64 doesn’t keep it in place.
EDIT: Maybe a workaround? I set my Elvui scale to .65 and set my CVars, uiscale .65 & useuiscale 1.
So that they match Elv… My previous scale was a bit hard to read anyways, so maybe blessing in disguise?