It’s probably not as good as it possibly could be, but in a automatic rice cooker the timing isn’t manually set, it just cooks until all the water is absorbed / boiled off. So, cooking brown rice on the white rice setting would still take way longer and probably be fine.
That must have been some very al dente rice. When cooked in a pan brown rice needs more than twice the cooking time than white.
It’s probably not as good as it possibly could be, but in a automatic rice cooker the timing isn’t manually set, it just cooks until all the water is absorbed / boiled off. So, cooking brown rice on the white rice setting would still take way longer and probably be fine.