Well, I wasn't sure if the mark thing was a bug either, but it seems pretty imbalanced despite the weakness to holy damage, since you can cancel all your mark buffs the minute you spot a holy damage dealing enemy without any penalties whatsoever. As for Brax, if you've bothered to look at the screenshots, it is painstakingly obvious that A LOT of turns have passed and Brax is still sitting with his thumb up his-whatever. I've just tested it with spacial instability potions in 1.1.3, still works exactly as I have described above (except I had to drink like 10 potions before the RNG sent me outside the shop). Passing turns does nothing, spellcasting does nothing, attacking monsters does nothing, ONLY NORMAL MOVEMENT WITH STOLEN GOODS OUTSIDE THE SHOP SETS OF THE DREAD COLLECTORS. All tested, except interaction with chests/doors/levers, though I'm willing to bet that won't set them off either.