Crafter cannot output more than one item to a Composter

The bug
When a Crafter attempts to output multiple items at ones in a Composter, only one item will be composted and the rest will be dropped as item entities inside the Composter.

• In 21w45a, the Composter composted all items as one, but since 21w46a, it composts only one item and drops the rest. This is probably related to MC-265950 (which properly fixed a similar issue, but only on Chiseled Bookshelves)

To reproduce:

1. Place a crafter facing downward directly above a composter

2. In the crafter, put a stack of cocoa in the top middle slot and two stacks of wheat in the two top corners (this will output 8 cookies)

3. Place a button on the crafter and press it

4. Open your debug screen (F3)

5. Look at the "level" state of the composter
   ❌ See if the composter went up more than one level (normally 8 cookies would raise it a few levels)

6. Switch to spectator mode (F3 + N)
   ❌ See if there are cookies inside the composter

What I expected to happen was...:
The composter composting all the cookies at once

What actually happened was...:
The composter could only compost one cookie and dropped the rest as item entities.