Nunes blew her wad in round 1. It was a great finish and performance by Zingano, but Zingano was on her way to winning a decision anyways.
Tate/Zingano was sort of killed by it being a bad stoppage. It was really just a replica of Sakuraba/Conan:
The ref stopped the fight as Tate dropped to go for a takedown:
While Tate didn't protest the stoppage, she is a warrior, and would have kept fighting.
Also kind of ridiculous how Sakuraba/Conan 1 is officially a no contest, whereas tons of other early stoppages (ie: Shane Nelson v Aaron Riley 1), are still on the books. I think Dober/Silva may be one of the only modern fights overturned due to a premature stoppage.