It makes a perfect sense actually, Navarro looked much more fresher and determined, she is still a top 20 player, can beat anyone on her day, hasn't been that busy as Iga recently and by recently I mean from RG to this day.
Iga looked tired and numb, those top players play a lot of matches during the year, one can not seriously expect them to be perfect every usuall working day.
No regrets.