The bug
When using a bucket in creative mode to pick up a fluid from within the world, a maximum of one (1) buckets appear in the inventory. However, milking cows does not have a limit on the amount of buckets / bowls provided, which does not seem consistent.
If a bucket of milk / bowl of mushroom stew is already present within the creative player's inventory, any subsequent milking of a cow should either just not give a milk bucket / mushroom stew to be consistent, or milking should be denied outright (i.e. no hand animation nor sound plays).
Linked issues
relates to 3
MC-193578
Milking mooshrooms in creative mode grants mushroom stew even if it's already present in your inventory
Open
MC-188654
Using a filled bucket in Creative mode does not provide the player with an empty bucket
Resolved
MC-188969
Having a suspicious stew in inventory prevents all types of suspicious stew from going into your inventory when milking brown mooshroom
Resolved
muzikbike
This is the same with Mooshrooms and Mooshroom/Suspicious stew, should this be included in this issue or a new one?