Yep, same trailer, same outlet valve. I also tried to figure out which was leaking (food coloring). By color it was the kitchen grey tank. But, I'd have toilet tissue in the mix as well. My thoughts were as above, that bumpy roads make the valve open a bit.
The door strap on ours survived many trips so didn't have to change it.
We did hit some really good bumps on one trip that caused the bottoms of the drawers in the BH to fall out. I ended up reinforcing the drawers and changing the support wood for the drawers (factory uses cheap 1/8" plywood and some staples).
2017 Eagle HT 29.5BHOK (sold)
2017 Ford Powerstroke 6.7, Crew, 4x4 (sold)
2018 Toyota Highlander
Maggie, Old English Sheepdog