Shulker don't create their new copies when being hit by a shulker bullet

This bug is a parity issue. If the shulker bullet hits the shulker, it doesn't duplicate/create a new shulker, which is changed in the latest Java snapshots.

Step to Reproduce:
1. Spawn some shulkers.
2. Go to survival and try not to get hit by shulker bullet.
3. Switch to creative and stand right next to a shulker, so the bullets will go towards the player and the shulker next to it.
---> It doesn't create a new shulker