When destroying an end crystal, the explosion does not destroy blocks. I tested this in both the Overworld and the End, and I got the same result.

How to reproduce:

1. Place an end crystal, or find one naturally generated on an obsidian pillar.
2. Place at least one block near the end crystal that can be destroyed by explosions. You can skip this step if such a block already exists nearby.
3. Destroy the end crystal, and notice that all surrounding blocks remain intact.

I tested this with dirt, which has a low blast resistance, so I expected it to get destroyed.

While the impacts of this bug are minor, it prevents players from using end crystals as a "fancier" substitute for TNT.