Sorry for bringing up an old bug, but it happened to me aswell.
I believe it has something to do with fluid ideology, because i noticed the ritual seating was made before i reformed the religion, and deconstructing the seating removed the debuff. This correlate with seating being directly related to a religion and not to a style and new religion != old religion.
If i make a new seating the debuff returns. By making a lot of style buildings near the seating i am able to remove the debuff.
this was on 1.3.3200
I believe it has something to do with fluid ideology, because i noticed the ritual seating was made before i reformed the religion, and deconstructing the seating removed the debuff. This correlate with seating being directly related to a religion and not to a style and new religion != old religion.
If i make a new seating the debuff returns. By making a lot of style buildings near the seating i am able to remove the debuff.
this was on 1.3.3200