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

• Colytra: colytra-1.12.2-1.2.0.3
• Caelus (for 1.13+):
• Forge: 14.23.5.2838

Observed Behavior: When going into the nether, elytra when baubled seems to have the chance to not work in the nether

Expected Behavior: Elytra will activate 100% of the time

Steps to Reproduce:

1. Go through nether portal in multiplayer
2. Try to activate elytra
3. If it works try again
   ...

Crash Log: Please use a paste site like hastebin.

Unfortunately, I can't reproduce this behavior. I don't ever see the Elytra not activate when used as a bauble in the Nether. Since you stated that this only happens rarely, is it possible it's a result of some lag from the server? In addition, are you able to reproduce this at all with only Colytra and Baubles installed?

Can you be more specific about what you mean by "activate"? Because there's a toggle Elytra function in Colytra, so I don't know if you're talking about that control specifically or just being able to use the Elytra itself.

Also, can you clarify which of these situations you're talking about:

1. The Elytra will work completely fine or not at all in the Nether, randomly decided upon when traveling to the dimension
2. The Elytra sometimes works and sometimes doesn't in the Nether

The elytra sometimes works and sometime doesn't in the nether, although its pretty rare to have the elytra not work in the nether
And what I mean by not activate is that when pressing jump in the air it will not allow you to fly and simply acts as if you have no elytra on.