When trying to stack together items that convert into other items (such as converting into a bowl), they cannot be re-stacked once split apart when in Creative Mode.

This also affects items if they are obtained by crafting. If that same item is then spawned with the /give command (using the exact same components and data as the crafting recipe), they will not be able to stack together with the crafted version of the item regardless of what mode the player is in.

What I expected:

For the items to be able to free be stacked and unstacked together.

How to replicate:

1. Use this command in-game:

/give @p minecraft:stick[food=\{nutrition:1,saturation:0,using_converts_to:{id:bowl}}] 64

2. Unstack the items, and then try to stack them back together while in Creative Mode.

The items can be stacked together in Survival Mode and Adventure Mode, but not Creative.