Here are some pictures of the chamber / alterations, just in case someone spots something that could be adding to the water issue.
Patched the shelf holes. I used spray foam to insulate, JB Water Weld Epoxy putty to patch and then appliance spray paint to conceal.
I used white food grade silicone to put down the markerboard floor over the floor and drain in the picture below. I didn't insulate the drain hole though. When I replace the water damaged markerboard floor, I will probably spray insulate the drain to see if it helps.
I replaced the interior door wall with a flat whiteboard and the replaced the door seal with a new one.
I ran the 3 cables through the same very tight hole and added spray insulation on both sides to help seal it.