Ran into this store today on DL3: As you can see, Brax has blocked the corridor. You can't use Artful Dodger because the tile behind him becomes shadowed and as such it doesn't let you jump. The minimap confirms that behind him is more of the store (I found out there's 3 more pedestals behind him along with the fridge, which leads me to believe that Brax is incorrectly positioned.
Picking up an item works. Rocket Jump will also work, as will some of the other teleport-esque abilities. Just watch out where you aim skills that do splash damage.
Brax is exactly where intended. It's a puzzle (as suggested by the text of the sign North East of him which says something along the lines of "Stockroom is for employees and clever customers only", I forget my exact words). There are several different ways to get past him, at least one of which can be done by every single character (once the player figures out how it works). Think outside the box, and you shall be rewarded.
The room in question was originally part of the Interior Dredmorating mod before being ported over to YHTNTEP.
I just started using your mod (and all the others) after my first successful run: the day before the dagger/polearm patch came out. And I was using just core game + realm of diggle gods for that run, so it was kinda confusing me seeing 2 dlcs and a shipload of mods all together. Anyway, nice idea Bergstrom