Possible Fixes

Yes

Modpack Version

9-0.2.56

What happened?

Travelers Backpacks will be Listed with 1 and 2 to show separate Backpacks

1. Wear any kind of Traveler's Backpack[1] on your back + wear a Sophisticated Backpack in the "Back" Slot
2. Kill the player
3. Wear a new Traveler's Backpack [2]
4. Pick up your grave

Causing Issues:
Sophisticated Backpack and Traveler's Backpack [1] will be put into the "Back Slot"
Both backpacks can be taken out in random order from the slot (after taking one backpack out, the other backpack appears in the slot)
Backpack [2] will be voided and overwritten with Backpack [1] from grave
Sophisticated Backpack is unchanged

Issue didn't exist before the 2.55 change of including Traveler's Backpack in the grave when dying

latest.log

https://gist.github.com/Aurora8orealis/e909c414675535f7d10a785cc64d6481

Developer reports

No response