Describe the bug
When I place a mannequin on a server, I can rename it to anyone's skin except my own and the skin will show up. But when I rename it to my own skin, I see Steve. I'm about to have my testing partner log in and see if she can see the mannequin of me, as well as one of her. I also attempted to have someone else rename the mannequin to my name, but my skin still did not show up on the mannequin.

This same player tried to make a mannequin of himself and was unable to see it, but when he viewed a mannequin of himself that I made earlier, he was able to see it.

Debug crash log
https://pastebin.com/iMdRkUX2

Additional context
I saw EntityPlayerSP in the list of mobs for my own username, whilst also seeing EntitryOtherPlayerMP for the plyer I was asking to help me discover the issue. Could that be the problem somehow?
Also, this problem appears to not be an issue in Single Player testing worlds.

Mod Version
1.12.2-0.49.1

Screenshots
https://imgur.com/a/UCMX1f3

When I log into a single player world and view the various mannequins, then log into the multiplayer server, I see my own mannequin. This might be behind the inconsistency I see occasionally.

Is maybe fixed, can you test dev build 586 or newer to confirm?

Attempting to join a server with that version of AW resulted in a 27MB log file on my client, filled with NPEs. I don't think that build is working at all...

Oops, hang and crash was related to a different mod after all. Once I resolved that my test environment shows it working on a local server.

Just a bit of wonkiness now. https://imgur.com/a/ud1UJjZ

I think that should be it.

Will be in build 588.