Intended Behaviour: Squids spawn without issue
What happens: No squids.

I've had a major problem with the Realistic worldtype, as squids will not spawn whatsoever in my world. I've gone to many oceans, killed off mobs to free up space in the mob cap (though it's unlikely to affect it as I believe squids have their own mob cap), and still nothing. If this can be fixed for 1.12.2, then I would appreciate it.