Cat Zingao vs Miesha Tate was stopped early

Not the worst call ever, but after looking at it again it seems Tate was going for a takedown and the fight shouldn't have been stopped. When I first watched it I thought Tate fell by being rocked from Zingano, but she willingly dropped down for a takedown attempt. Sure it was a weak attempt but it was an attempt and she was not turtled in the fetal position or anything. She was still "intelligently defending" herself.