Hey there @Garebel, while boss level scaling isn't a bug, something in your previous report caught my eye. Doing the Alldrak quest does remove the Pixrout from your inventory, so I'm wondering if you're still able to retry the battle after losing?

To explain a bit, the reason that boss levels scale with yours is a way to make sure that the bosses stay challenging, so the game isn't too easy. The good news with Alldrak is that he seems to stop scaling once you're beyond a certain level (maybe it was 15, but I may be wrong) so you may just need to grind a little more to beat him. I also recommend bringing health potions, which seems like simple advice but they're really useful when dealing with scaling bosses. :0

Again, please let us know if you're still able to retry the Alldrak fight, and I'm sorry that it's been causing you frustration. >w<