I'm not sure if this is true for the other biome density settings but the pollen density setting doesnt work. I've tried changing it but the density remains the same(confirmed using a small biome particle radius to ensure I'm not counting incorrectly)

If you change the value and restart the game does it work then?

Yes it is working if i restart the game.
Sorry

Great, however, it shouldn't need the game to restart, so it's still somewhat bugged