Shingles are in decent shape. However, roof company says complete take off is needed. Replace almost all sheathing, shingles. Inside the marriage beam has dropped some and now we have this issue, some call it ghosting. The ceiling at marriage line is turning dark and popcorn ceiling is falling off. But this is the only place you see this. The ceiling from the walls in, is fine just from marriage line out. Some say the return is pulling the hot air out of ceiling at the marriage line causing condensation, as well as, moisture seeping under shingles. We have been holding off roof repair because of triple prices due to pandemic. If u have had this problem, what did you to solve your problem and how did u repair the ceiling?