BetterEnd and Origins are conflicting somewhere with elytras, the elytras within BetterEnd do not activate the mods of the github repo said to post here as well, Here is the issue link > paulevsGitch/BetterEnd#231

I have the same issue with armored and crystallite elytras, even when I am not using a flight-related origin.

Should be fixed when #465 happens in all mods involved

No longer relevant since Origins uses the new Fabric API starting in 1.2.0.