I upgraded from .20 to .21 and everything seemed ok in Chrome.
Then I ran my app on my phone and
ng-click seems to have been broken (probably the touch aspects of it). I downgraded ionic.js and ionic-angular.js and it started working again.
I then upgraded only ionic.js and it continued to work. Then ionic-angular.js and it stopped again.
However when I added
overflow-scroll="true" clicks started working again…rather peculiar.