End crystal explosion kills other crystals but doesn't explode

• The bug

End crystal explodes but doesn't explode other crystals within the explosion range, it will just kill the crystal.

• How to reproduce

1. Place 2 end crystals with 6 block gap between them. (See screenshot for setup)
2. Shoot one of them.
3. See how the explosion will just kill the other crystal.

• What expected?

The other crystal would also explode but this does not happen.