Versions

Silent Gear 4.0.20
Silent's Gems 5.0.3
Silent Lib 10.4.0
Neoforge 21.1.162
Minecraft version 1.21.1
Private Modpack
Optifine is not installed

Expected Behavior

Elytra Flight

Actual Behavior

No behavior. Silent Gear Elytra does go into the slot, but does not do anything while equipped there.

Notes

Vanilla Elytra does work as intended in the Curios back slot

Silent Gear Elytra does work in the Vanilla chest plate slot

I believe you need the Caelus API for Elytra's to work. See: https://www.curseforge.com/minecraft/mc-mods/caelus

I believe you need the Caelus API for Elytra's to work. See: https://www.curseforge.com/minecraft/mc-mods/caelus

That mod is installed in the pack. As stated, vanilla elytra does work. Only the Silent Gear ones don't