Yea my Keyway case on my 15 Pro eventually started showing an outline of the ring, but it took months and was mostly subtle.
This is after a week on the Belemay, and after I already tried wiping/message it out (got there near the top). The white spots are shiny - thats just the light hitting them for the picture. I'm guessing built up wax from the heat? Either way, not something I had to deal with with my last case, so perhaps the sensitivity of the crazy horse leather is not for me.
