I'm sure it will happen. You don't hear much about those jurors in the news do you? It's like a black-out.
I have never sat on a federal jury but the state courts I've been on the only one allowed to communicate with us was the bailiff and only to the jury fore person.
It appears to me had the jurors truly voted their belief assuming they didn't then they could well have had an outcome of on the 12 charges that ranged from;
guilty on one or more
not guilty one or more
and hung on the others
If they didn't vote their belief then they really need to be before a court to explain why....