TNT explosions delete dropped items

The bug

Item entities are destroyed by TNT explosions.

1.14 snapshot 19w11a changed TNT explosions so that they drop all items for blocks destroyed in the explosion (https://www.minecraft.net/en-us/article/minecraft-snapshot-19w11), however this change is obscured when using more than one TNT as many items which survive one explosion typically do not survive the next.

How to reproduce

1. Create a 7x4x7 cuboid of slime blocks inside a hollow bedrock cup
2. Remove the top center slime block and the one below it, replace both with TNT
3. Light one TNT
4. Take note of how many slime blocks are dropped

Expected results

All 194 slime blocks are recoverable as dropped items.

Actual results

Most are destroyed by the second explosion - usually only one or two are recoverable.

How to fix

TNT explosions should do no damage to item entities or experience orbs.