If used alongside the underground jungle mod, the spider biome doesn't generate.

[Gydalf]

I can't provide any logs as it doesn't cause a crash. The versions used are, spider caves 20.1.0, underground jungle 20.1.2, and phantom library 20.1.5. All on forge minecraft 1.20.1. Feel free to ask for any further details, I tested with no other mods than nature's compass 1.20.1-1.11.2