While I had discussed a solution with someone not too long ago, I am putting this up here just in case.

If one has JEID installed, it prevents rites that change biomes from working right, due to how it’s changes in biome ids are coded.

I've been making a PR on their end. I hate what I wrote for it, but it seems to work, otherwise.

Only hope is that if they do take it in, they improve it.