The bug

When destroyed by an explosion, bee hives and snow layers will always drop 100% of the items. Nether vines will drop 33% of the time like usual, unaffected by the explosion. This is because the loot tables don't have the survives_explosion/explosion_decay functions that nearly all other block loot tables have.

I went through all the block loot tables and these were the only unusual ones. Everything else either requires a specific tool to drop in the first place, or is intentionally a guaranteed drop (like shulker boxes, beacons, and heads).

How to reproduce

1. Place a bunch of bee hives (not nests) on the ground
2. Spawn a creeper and ignite it with flint and steel
3. Collect the drops
   →  Every single removed block is accounted for