Customer had us out today to investigate a water spot in her pantry. Found the master tub/shower directly overhead of this spot. There was an access door to the drainage and valve. Ran water and saw no signs of leaking on the drainage or valve itself. The trim plate for the valve was missing caulk and there was a small gap at the top of the plate. Caulked the trim plate and this should take care of the issue. If we need to return, we will need to cut into the ceiling below this tub to further diagnose the issue. No follow up at this time.