Firstly I would use Reminders to do this. They mirror through nicely to Watch although nothing will mirror through if the iphone is being used.
Secondly I set alarms to go off on the Watch on the Watch itself which are in separate to any alarms in the Watch. Watch notifications fir an iphone alarm will just be a haptic and a ding, the alarm sound goes off on the iphone .
Thirdly I'm still getting haptics on 9.2, so the general fixit for unexpected behaviour is...
First force restart it
i.e. press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo.
If that is no help
Unpair and erase your Apple Watch
and then
Set up your Apple Watch
If no better you may want to unpair then set up without restoring the backup.
If still no good ensure you have no security apps on the iphone that may be mirrored on the Watch.
If you've completed that troubleshooting and the issue is still not resolved, Contact Support.
Click here > Contact - Official Apple Support
or phone numbers
Click here > Contact Apple for support and service - Apple Support