po3 grave bug


**I am currently running**
- Modpack Name: Project Ozone 3
- Java version: 1.12.2
- Operating System: 64-bit

Please include as much information as possible. For the description, assume we have no idea how
mods work, be as detailed as possible and include a step by step reproduction.
**Issue Description**

When I was running around in the nether, I wasn't paying attention and jumped down some blocks and took fall damage and died. There is a grave mod installed which makes it so normally when you die, your death is a grave and you spawn in with a grave key. But even though keep inventory was on, I died and my stuff was put in a grave.

Please provide a *full* log (and crash-report if applicable).
Go to https://pastebin.com/ and upload them there, then paste the resulting link here!