Seems to be fixed in 1.20.5, now requires the item to be minecraft:potion, minecraft:splash_potion or minecraft:lingering_potion.
Can confirm in 1.20.5.
crazysmccrazysmc
MC-271199![[Mojang] Rebecca](../../../data/avatars/users/18936.svg){kind=small}
Seems to be fixed in 1.20.5, now requires the item to be minecraft:potion, minecraft:splash_potion or minecraft:lingering_potion.
Can confirm in 1.20.5.