Both times that I moved the NPS into the tank I placed them beneath the overhangs and they were very deeply shadowed.... I can’t imagine they would still have been burned while in shadows?Based on your previous posts the only thing that really strikes me as being potentially significantly different is the lighting. Even with the NPS corals it might be affecting them? The AI have a much wider range of diodes including UV.
I am not in the camp of something from the rock as I think it would be affecting the other tank inhabitants also. But it's just a guess!
I agree with the Tropic Marin Pro salt. I switched salt because I like to run around 9dkh