Most mob heads are now ejected from a dispenser when no valid target is present

The bug

This issue was introduced in 24w36a.

Mob heads that are placed in dispensers can be equipped to mobs and players when the dispenser is activated. In previous versions, if there was no valid target, the dispenser would simply do nothing. Since 24w36a, the item is now instead ejected onto the ground.

This does not affect wither skeleton skulls or carved pumpkins. They still remain in the dispenser on failure, likely due to their additional functionality of spawning golems or the wither.

Note that other equippable items like armor pieces are also ejected on failure. It’s unclear which behavior is intended for heads.

Steps to reproduce:

1. Put all mob heads into a dispenser

2. Stand in front of the dispenser and activate it multiple times

Expected behavior

The first mob head should be equipped to you, subsequent mob heads should remain in the dispenser

Observed behavior

Subsequent mob heads are dispensed onto the ground like regular items