Just found a fix for Mia second date (nothing...) text bug until next update, if you cant continue your dates with Mia go back to your previous save, and the night before (or morning of) that you ask Mia to go on another date, Set a save point, if you leave the store and come back before leaving for the date, her dialogue will say (nothing...) but if you don't leave the store before leaving with Mia it will work ( TL;DR, Don't leave the store when Mia is standing next to the door waiting for you. That's rude.)