[Perisno] items keep disappearing

specifically the inventory books and camel. i kept them at the bottom of the inventory and.. idk how or when it happens but at first i thought i sold them by mistake when spamming the mystic merchant so i just used the cheat to get those items back (it's a pain to find them all by legit means). but then after the 3rd time i noticed them going missing when i was just travel around hiring troops.

anyone can shed light on what's triggering this, and if it's possible to stop it?