First reported on GitHub: https://github.com/MinecraftForge/MinecraftForge/issues/4764
This crash is not very common and due to that, almost impossible to reproduce.
This crash affects some mc networks, not just us.
Things we all have in common:
BungeeCord 1.12.2 or HexaCord 1.12.2, not older than a month.
A spigot hub. Can be 1.11.2 or 1.12.2, the version doesn't seem to be important
A Sponge-Forge 1.12.2 server with either Pixelmon or Direwolf20 installed.
A 1.12.2 Forge client with either Pixelmon or Direwolf20 installed
How to reproduce:
Login via BungeeCord on your spigot lobby server.
Now use /server pixelmon or /server direwolf to switch to pixelmon or direwolf
(Try to be lucky)
We are not sure if SpongeForge is the issue, but we don't think so as it's a client crash and we don't get an error serverside. We can't really test without Sponge,as this error is not occuring that often.
Now, your client can crash with a small chance with the following error:
EntityPlayer.func_192028_j https://pastebin.com/CcywjKzt https://pastebin.com/P5ASABrU
We weren't able to discover a pattern in these crashlogs.
Attached are some guesses as to what may be the underlying cause.
Again, thank you for taking time to look at this, and I hope to hear back from you soon.
fml-client-latest.log