Initial Questions

• I have searched this issue tracker and there is nothing similar already, and this is not on the list of known issues. Posting on a closed issue saying the bug still exists will prompt us to investigate and reopen it once we confirm your report.
• I have verified that this issue occurs in a SUPPORTED environment, meaning I can reproduce this WITHOUT OptiFine, and without Bukkit+Forge server software like KCauldron, Thermos, Crucible, Mohist etc

Mod Version

2.6.0

Describe the Issue

Issue:
Elytra does not render/trigger when jumping in midair:

Steps to reproduce:
Open singleplayer world to LAN
Have a guest connect
Have the guest equip elytra to the wing bauble slot

Expected Result:
Elytra works in both the chestplate and wing bauble slot

Conflicting Mods

No response

Crash Report

No response

Other Details

Elytra does work in the chestplate slot in the same LAN world:

Both the host and guest accounts were operated by me on the same machine.
The elytra are saved for the guest after leaving and rejoining.
Other baubles work fine (tested with that focus pouch in the images, also tested Thaumic Tinkerer's Talisman of Remedium).

I tested some stuff from Aether Legacy Departure. The Haste Ring does work for a LAN guest, but the golden feather does not function and none of the gloves render. While this could be a problem with implementation by EFR, ALD, and Cutting Edge, I'll continue this with jss this since all of those mods' problems relate to Baubles Expanded.

This may be reopened if he determines this is a bug on our end after all; jss did implement it for us.

Have you tried 2.6.2? Have you tried on a minimal setup (no other mods besides Baubles Expanded and EFR and their dependencies)

I can confirm that this still occurs in a fresh instance with just EFR 2.6.2, Baubles Expanded, and Unimixins:

The elytra worn by the guest do render when the LAN host views the LAN guest (koolkrafter6 is currently the guest and the same account as the first image):

Has this been reproduced on a minimal setup? That's probably what "fresh instance" means

Also try testing other mods that have Baubles Expanded slots, to be sure this issue is specific to EFR.

What other mods add Baubles Expanded slots? I am not very familiar with BE. I showed that (at least some) Thaumcraft and Thaumic Tinkerer stuff works in the original post, but I don't know if those slots are different since they're from the base version of Baubles.

Cutting Edge and Aether Legacy Departure

The Compact Collapsible PortaCart from Cutting Edge also does not seem to work for a LAN guest, despite being worn in the belt slot. I'll bring this up to the devs of Baubles Expanded, since this seems to be an issue with that.

I'll let you decide, since I have not tested myself if this is really a Baubles Expanded issue. If you truly think it is, I'll close this.

jss2a98aj is in our Legacy Modding Discord. Baubles Expanded has channels there too