Is a Potion of Acquiescence consumed if it fails in werewolv.es?
Is a potion of acquiescence on werewolv.es still used up if it's used on thief's target same night, which would mean no thefts take place?
A consumable item is used up whether or not the result is "successful", for example a crossbow is still used up even if it hits a player with armour.
So if the potion bounces because a Thief targets the the same player, or another player uses a separate potion of acquiescence, the potion(s) are still used up.