[Bug] Immediate Crash after joining a server that teleports you to a second lobby

Describe the bug

To prevent crashes, I've found that using CustomSkinLoader version 14.17 works best. I'm not sure what went wrong with the newer version or what's causing the crashes. I've disabled all my mods and attempted to use the latest version of CustomSkinLoader on its own, but it still crashes.

Steps to reproduce

1. Open Feather Client and visit play.jartexnetwork.com with CustomSkinLoader mod and Optifine
2. If you don't have an account, make one. Then enter Bedwars and log out (only if you're new to the server)
3. Rejoin the server and you'll be instantly teleported to Bedwars and then you would crash afterwards

Mod Version

14.18.1

Minecraft Version

1.8.9

Minecraft Launcher Name and Version

Feather Client

Mod Loader

Forge

Operating System

Windows

Before submitting a bug report

[X] This bug wasn't already reported (I have searched bug reports on GitHub).
[X] This problem is triggered in the latest version of the mod (if not the latest please upgrade the mod first)

xfl03 / MCCustomSkinLoader

[Bug] Immediate Crash after joining a server that teleports you to a second lobby #278

Describe the bug

Steps to reproduce

Link to crash-report if applicable

Link to CustomSkinLoader.log if applicable

Link to latest.log if applicable

[Only Forge User] Link to Forge Log if applicable