Steps to Reproduce:

1. Have stuff in your inventory
2. Equip items in at least one of the following slots: main hand, off hand, armor
3. Find or place blocks in a low ceiling configuration
4. Get into a swimming or crawling state
5. Enter the small space underneath those blocks, making sure you can't stand
6. Die in any way

Observed Results:
Your experience, as well as all items that are equipped on the main hand, off hand and armor slots are dropped on top of the platform, while everything else is dropped under the platform

Expected Results:
Everything drops under the platform, which is the actual location of the death.

Screenshots/Videos attached: Yes

Notes: In a regular survival setting, this can easily happen when drowning in narrow flooded caves, which can make it significantly harder to locate important items that may get stuck in some random cave between the death spot and the surface.