Hi, I have a 2014 360 XL had the same problem water came in through cabinet above table when slide was out. I also had a issue with the slide banging when I would retract it. The problem was the slide gasket was off, it was the main gasket that goes completely around the slide I could see it was off from the side near the refrigerator and when you would look on top of the slide from the drivers seat. I attempted to put it back into place but there was no room to get to it on top of the slide. My rig was still in warranty and the dealer put the gasket back on but they had to take off the topper to do it I believe. After the gasket was repaired no more leak or sticking slide.
Hope this helps Bldhnd617
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