It was pointed out on reddit, that it's really odd that bandits never drop any stamina potions. This makes it look like the player is the only one suffering from stamina rules. It also looks odd because our Guards do actually have stamina potions. Which they don't use due to AI constraints, but still it is way more believable to find some in their loot.
I suggest to keep the overall chance of bandits dropping a potion unchanged, but add some stamina potions to their potion lists which are purely healing potions and poultices at the moment.
Bandits also drop stamina potions.