Describe the bug
1.12.2, appliedenergistics2-rv6-stable-7.jar in pack Enigmatica 2 Expert 1.81a

I set up an export bus, and the moment I drop a fuzzy card into it, the server freezes. I am not sure if it will ever unfreeze. After about 10 minutes, the server OOMed. I am running with Xmx 8gb...

To Reproduce

1. set up export bus with some item to export
2. add a fuzzy card

Expected behavior
Not freeze the server

Additional context

Environment

• Environment:
  See above screenshot for the stack trace.

My AE2 network is pretty expansive, with about 150 molecular assemblers and dozens of machines. A few storage buses attached to storage drawer controllers, mostly small, largest one has about 80 items in it. Couple of storage buses attached to crates. Around a dozen P2P connections. Only a few recipes (definitely less than 10) are oredict enabled; I have heard that the oredict option is much slower. Plenty of RF being fed into the system, verified by the network tool.

Sorry, we currently do not support any version older than Minecraft 1.15 anymore.

This specific part has actually been changed in 1.15. If you can reproduce this on 1.15++, please let us know.