Returned to investigate a recurring leak. As shown briefly in the provided video, we performed a detailed water test on the waste and overflow as well as each fixture individually to isolate the source of the leak. We also tested the grout line where the tub meets the tile and thoroughly sprayed all shower walls. The only area that resulted in a leak was the waste and overflow assembly. To resolve the issue without replacing the entire assembly, we will replace the gasket, bracket, and head piece through the rear access we will cut. This repair will renew all components responsible for maintaining the watertight seal. Parts are on order and estimated arrival next week