Blocks broken by the obsidian platform regenerating do not drop as items

The bug

When the obsidian platform regenerates and sets a cuboid above it to air, all of the blocks that occupied that space are removed as to create a safe air space for the player. However, none of those blocks actually end up being dropped as items, meaning that any blocks placed inside of this "danger zone" will be lost permanently if another player or entity enters the dimension.

How to reproduce

1. Create a mechanism to continuously send entities through an end portal

2. Enter the End

3. Place a block on top of the obsidian platform

4. Wait for the next entity to enter the End

Expected results

The block placed on the platform would be converted into an item entity.

Actual results

The block is no more. It has ceased to be.