End portals delete blocks that are inside of the portal

When you place blocks inside of an end portal, then light the portal, the blocks get deleted. They don't even drop anything, so the block is gone forever.

What I expected to happen was:

• The blocks will drop when the end portal opens

What actually happened was:

• The blocks get deleted and don't drop anything

Steps to reproduce:

1. Build an end portal but don't put in the eyes
2. Place blocks in the middle of the end portal
3. Put in the eyes; the blocks will get deleted
4. Go through the portal

Notice that the blocks got deleted, but they did not drop anything

Fix suggestions:

• Easy fix: Make it so the blocks drop when destroyed by the end portal
• Hard fix: Make it so the portal will not open until there is nothing in the way