Original report: EnigmaticaModpacks/Enigmatica6#1328

Issue description:

After placing a lava crystal (from blood magic) in a heat generator (mekanism), server crashes whenever someone enters that chunk. I've reverted the server to a version prior to putting the lava crystal in the heat generator, but wanted to report it!

Steps to reproduce:

1. Place Lava Crystal in Heat Generator

Version (make sure you are on the latest version before reporting):

Forge: 1.16.5-36.0.22
Mekanism: 1.16.4-10.0.19.446
Other relevant version:

If a (crash)log is relevant for this issue, link it here: (It's almost always relevant)

https://gist.github.com/NillerMedDild/d3578ea6917a89eaf658996d845c175b

Hmm my best guess is that we are slightly too strict on the validator and that the lava crystals when emptied don't provide a capability (like empty buckets do) and they don't have a "burn" value. I will make sure to expand validation to allow for all items at some point (though potentially not before 10.1), as I figured everyone would make their empty containers still be fluid handlers for purposes of being able to be filled with automation, but it is technically valid that they are not.