I think this is intentional; I remember a post somewhere saying that the Discover: Something? encounter recovers 5 stamina, but I can't find it right now.
@LouckyKoneko it doesnt recover stamina, just doesn't use any up. If it was intentional, shouldn't it be the same in all areas? It just feels off that this is only the case in Zanthous is all.
@Voidrot it is? huh, interesting! I admittedly don't pay a lot of attention to the stamina bar until it's low enough that I need to feed my wolves within 3 turns, so I might've missed something.