Metal Infuser Server Crash

[davqvist]

https://hastebin.com/aqujozevad.cs

Still on Foundry 1.2.1 (but changelog didn't say anything about it) Forge 2688

It crashes using this recipe: mods.foundry.Infuser.addRecipe(<liquid:poison> * 1000, <liquid:mist_acid> * 1000, <mist:sponge_slime>, 8000);

but only sometimes, not sure what exactly makes it crash.