Potion inconsistency

Whenever you drink or eat an item that turns into a different item on use(in survival mode), like mushroom stew and potions, it goes into a different slot in your inventory instead of your main hand even though the item is not stacked or there is no other item that is the same in your inventory

 

How to reproduce:

1. Go to survival and be sure that there are no glass bottles or bowls in your inventory
2. Drink any non-stackable potions or the soups

Expected: the item will end up in your main hand

What happens: it goes in to a different slot in your inventory