I don't understand English is not my first language sorry what does this mean

Originally posted by DISGUSTANG_

things like tumors, cybercore, pumpkin and biomass are spawners.

I'm guessing before the patch whenever they spawned their units, if it is the first batch were far away. It would create another subspecies even though it's from the same spawner

So now the spawner will only spawn units of the same subspecies