I'm not a fan of the bowl coatings that some manufacturers use. I had a Peterson St. Patrick's Day pipe that had a bowl coating, and the first handful of bowls were terrible tasting. I did a salt treatment on it and smoked a handful of Sir Walter Raleigh and it got a lot better.
I currently own 5 Savinelli's with the most recent one purchased in 2020. I've owned several others that I no longer own, but of all my Savinelli's I've never owned one with a bowl coating or staining inside the mortis. All of my Savinelli's are/were great smoking pipes.
It's possible the stain soaked through, or it's a new practice. Which one it is, I can't say. Even though you bought a "premium" pipe it's still a "factory" pipe so there is always the potential for pipes to get past quality control. Especially considering the amount of pipes they make each day.
Like other's have mentioned; I would use the salt treatment on the pipe, and after 24 hours of soaking, give it another 24 hours or better to dry out. Then just smoke about 5-10 bowls through it and you should be off and going.
Good luck with whatever you decide to do.