Location issue FOUND. you were right about you can publish everything works like a charm.
But the reason I was still having problem was because I was editing and we know edit/publish are completely separated things.
So I figured those ads were missing on filters and incomplete on admin dashboard, you can reproduce and see Country field is gone once you edit an item with RS active and Stela.
I did the same test with Bender+RS editing an existing ad and Country doesn't brake up.
Also if you are on STELA and disable RS you can fix the ad just editing. So Stela is OK editing/Publishing.
I'm not the best tester but I'm trying to find what's going on despite of my programming skills limitations.