Creating a new world with custom ore generation works perfectly fine. However, if I exit the world and then reload, as soon as I load a new chunk, the game crashes when it tries to generate the modded ore. This was apparently also a problem with both NeoForge and Fabric and I don’t believe it to be an issue with my code after looking at the stacktrace and seeing similar issues that other have had. Not sure if it helps, but here is the post regarding the same issue on NeoForge as well as how they fixed the issue: NeoForge Generation Issue
Edit:
I’m using the most recent version of Forge 1.20.6
