On forge 13.20.1.2386, there's a surprising, and sometimes painful, worldgen cascade, and it looks like it's from the flower generation.

Are your flowers generating too close to the chunk boundary?

Thanks for letting me know about this, I'll attempt to fix this ASAP, maybe even today.

I've now released version 1.0.1 that fixes this issue. Thanks for reporting this!

I love this mod, so, great to see that fixed! :D