Originally posted by Nascarman:

To level up from 45 to 50 you would need to hit at least 400 arrows, so yeah, you’ve hit more than 150. Sounds like a bug, the lox might not be fully loaded somehow and isn’t taking damage from the bow.

How far away is the lox?

I don't know. Not that far away. No problem hitting with arrows. The size of the lox on my display, is roughly as big as the head of the player character.