Describe the bug
Main thread hangs occasionally for long peroids

To Reproduce
Unknown

Expected behavior
For the main thread to not hang

Additional context
Thread info https://gist.github.com/clienthax/5f871002b1ad4b41dadc876903c66ff8

Environment

• Minecraft Version: 1.12.2
• AE2 Version: appliedenergistics2-rv6-stable-7.jar
• Forge Version: forge-1.12.2-14.23.5.2847-universal.jar
• Modpack: The 1.12.2 pack

We do not support anything like Sponge or Bukkit officially. Only a standard forge environment.

Should you be able to reproduce it without it and in a new environment and save, please update the issue accordingly and we will reopen it.