My Minilight rear wall has buckled/separated at the bottom half. The joint between the bath cabinet and the tub/shower used to be tight. Now there is a 1/4" or more gap between the wall and those fixtures. Had an independent repair shop (highly rated locally) look at it and they said they did not think it was delamination. More likely, in their opinion, was that the factory either didn't connect all the fixture fasteners to the wall or used inadequate fasteners and the flexing/bouncing while moving caused them to separate.
Bothers the heck out of me but I'm just living with it.