When I upgraded to iOS 9 Beta a couple of weeks ago (the last public beta build before the GM release today), my Apple Watch stopped being able to launch apps using Siri. For instance, if I asked Siri to "Open Workout" or "Open Calendar app" it tells me it doesn't look like I have an app named "Workout" or "Calendar" and then offers to find it in the App store using handoff.
I've experimented with deleting and reinstalling a 3rd party app that had the problem, and after reinstalling it on the watch, Siri correctly launches the app again. Unfortunately, I can't use this method to fix the built-in apps.
I've not yet tried reseting the Watch or doing anything more drastic yet. I had hoped updating to the GM build of iOS 9 today might have fixed the problem, but it didn't have any effect. Before I try to upgrade my watch to watchOS 2, I want to figure this out in case it persists. Does anyone have any experience successfully fixing this issue if you ran into it? Or does anybody have any suggestions? My next step will probably be to reset the watch and restore it from backup.
Thanks in advance!