Versions (Be specific, do not write "latest"):

• Curious Elytra: 1.16.1-3.0
• Caelus: 1.16.1-2.0-beta5
• Curios: 1.16.1-3.0.0.2
• Forge: 32.0.106

Observed Behavior: Elytra cannot be deployed when in "Back" curio slot. Still functions normally in chestpiece slot.

Expected Behavior: Elytra to be able to be deployed.

Steps to Reproduce:

1. Equip elytra in "Back" cuiro slot
2. Attempt to fly with elytra (jump while falling)
3. Instead, fall because elytra does not deploy

This is a Caelus issue. Try updating to the new 2.0-beta6 version, which should solve the issue.