Describe the bug
Randomly when opening Mannequin's GUI the game crashes.

Steps to Reproduce
Steps to reproduce the behavior:

• Start Randomly opening Mannequin's GUI Maybe 10 times
• Success.

Environment (please complete the following information with the version):

• Minecraft: 1.16
• Mod Loader: fabric 0.11.6

Logs
Crashlog:
https://pastebin.com/qSDvm7jv

MixinTrace:
https://pastebin.com/CGgQwyn5

Not Enough Crashes deobfuscated stack trace:
https://pastebin.com/7z8kuxs1