My ecobee thermostat with the sandood Ecobee Suite device handler cannot be viewed in the iOS app. Tapping on it briefly shows a blank screen then goes back to the device list view. See video. This is not related to the other post I made about an undeletable device. That old device has been around for a long time and this behavior just recently started occurring. @storageanarchy
Reinstalling the SmartThings app appears to have fixed this. 
Closing this.