Sorry kind of late on this one, you may have it fixed by now.
I have a 2014 16DBS and had the same issue. The diamond plate bottom trim was separated from the frame from the front of the slide to about 1 foot from the rear of the camper. I removed the trim completely to get a better look and low and behold the wall was separating from the frame. From the inside of the camper you could see light between the wall and the floor where it comes together. Just a few sheet metal screws hold the wall to the frame and they all came loose or were pulled out from sitting on the sofa that's on the slide.
It had gotten so bad that the shower wall had a gap big enough you could see light from the bathroom while sitting on the sofa. I pulled the wall back in and then screwed it like the factory, then added a 1/8"x4" flat aluminum from the front to the back of the camper to reinforce the whole wall. The wall will not separate from the frame again. I then reattached the original diamond plate and all is good.
Point is, look very closely to that separation and make sure the wall is not starting to separate from the frame like mine did. Mine started out just like yours with the diamond trim separating just a little. Hopefully this is not the case for you and it was just me having this issue. It was an easy fix being how serious this could have been.
I have a 2014 16DBS and had the same issue. The diamond plate bottom trim was separated from the frame from the front of the slide to about 1 foot from the rear of the camper. I removed the trim completely to get a better look and low and behold the wall was separating from the frame. From the inside of the camper you could see light between the wall and the floor where it comes together. Just a few sheet metal screws hold the wall to the frame and they all came loose or were pulled out from sitting on the sofa that's on the slide.
It had gotten so bad that the shower wall had a gap big enough you could see light from the bathroom while sitting on the sofa. I pulled the wall back in and then screwed it like the factory, then added a 1/8"x4" flat aluminum from the front to the back of the camper to reinforce the whole wall. The wall will not separate from the frame again. I then reattached the original diamond plate and all is good.
Point is, look very closely to that separation and make sure the wall is not starting to separate from the frame like mine did. Mine started out just like yours with the diamond trim separating just a little. Hopefully this is not the case for you and it was just me having this issue. It was an easy fix being how serious this could have been.