Possible conflict with Biomes O Plenty?

The entire server crashed when a user entered the Nether. The crash reports seem to indicate it's a method of Blueprint that raises an exception, or is at least involved.

Versions:

• Blueprint: 1.18.2-5.5.0.jar
• Forge: 40.2.1

Crash Reports:

crash-2023-04-11_02.02.54-server.txt
crash-2023-04-10_23.32.08-server.txt

Even though a Blueprint class is mentioned in the stack trace, this is not a Blueprint issue.
The feature order cycle is a vanilla error. Due to the internals of Blueprint's modded biome system, Blueprint gets mentioned.
Use the Cyanide mod to get a better analysis of the error.

For future reference, if anyone stumbles upon this issue:

The Rare Ice mod ended up being responsible for this.