I run a server, and I have three players experiencing this problem. When searching through JEI, if any of them end up with Random Things blocks on the screen, they crash. I have two players right now who cannot open any inventories at all in-game because JEI saves searches, so RT will crash them as soon as they open anything. This is a problem that needs to be fixed yesterday.

RT Version is 4.2.7.3
JEI Version is 4.15.0.268

Crash Report for this issue:
https://paste.dimdev.org/ixikaviwof.mccrash

Seems to have to do with "Biome Stone" which I'm guessing is the biome crystal.
Ingredient Info: 1xtile.biomeStone@0 randomthings:biomestone