I was working on removing and redoing old grout/caulk in the guest bathroom for a house we moved into recently (built in 88, unsure if shower has been re-tiles since then). About 24 hours after I removed the grout line between the tile and the tub, I noticed some water beginning to pool around the bottom of the tile wall in one corner, along ledges of tub. One tile was somewhat loose and I pried it off to see what was going on. It looks like the tile was installed on green drywall? Behind the drywall is the lip of the tub. The drywall does not seem damaged, I can’t push through it or anything and it’s not crumbling. There is a bit of mold along the bottom but doesn’t look severe.
Does anyone have experience to know if a professional needs to come evaluate this further? I know tile on drywall is bad, but if it’s something that can wait a few years to redo then I will glue the one tile back on and defer the issue? Attached is a photo of where I pried off the one tile. No other tiles are loose
Since the drywall is not waterlogged I’m assuming there’s no damage to the framing of the house?