Biomes with exactly the same parameters in "Multi Noise" settings do not generate at all

If you set in Multi Noise the same parameters for 2 biomes, one of them generates, but the second one will never generate.

1. Set all parameters on biome 1 to 0.
2. Set all parameters on biome 2 also to 0
3. Import it to a new MC world.
4. → One of the biomes generates, but the second one will never generate