Nether Star can be blown up by explosion while inside shulker boxes

When you put nether stars inside shulker boxes, drop the shulker box and blow it up, it doesn't drop the nether stars. Instead, it gets destroyed as the box itself. This also breaks parity with Java Edition 1.17. (relates to MC-207405)

Step to Reproduce
1. Put nether stars into a shulker box.
2. Drop the shulker box (not place them)
3. Blow them up
---> The nether star doesn't drop.