Forge version: 13.20.0.2315
Twilight Forest version: 2.4.0.137

Steps to reproduce:

1. Have either Charm of Keeping II or III in the inventory
2. Have some items in the hotbar and inventory
3. Die in some way

What I expected to happen:
When you select respawn, you return with the items in the hotbar (II) or all items from your inventory (III) along with your armor

What happened instead:
While in both instances your armor returns, the items may not restore properly. Either the highlighted item in your hotbar disappears from the game (II) or your whole inventory disappears (III)

EDIT: Despite Charm of Keeping II destroying the highlighted item in the hotbar, it seems that it also restores the player's inventory.