Install forge, overloaded, an item mode, e.g. pipez (tested with 1.2.7)
Place instant furnace, pipe in items from chest using an item pipe from pipez on the top side
Wait for output to fill up in the furnace
Wait for input to fill up in the furnace. The moment it is 100% full it will crash.
This is also reproducible with other pipes, I tried mekanism logistical transporter and the same crash happened
The server will crash until the pipe is removed so no more item inserts will be attempted.
Minecraft Version: 1.16.5
Overloaded Version: 0.0.92
How to reproduce:
Crash log: https://gist.github.com/jinkhya/56d1d48e1508666c60c4f281f07e30a2