So are you saying for notifications sent from HE via the HE mobile app (virtual device in hub), none are working? The only thing that works is if you send it via Pushover?
The way you toss around the word "app" makes it very unlcear because you have apps on the Hub and you have apps on your phone.
I would try following these instructions (click link to open):
Once complete make sure all duplicate "Mobile App Device" 's are deleted from the hub, keep only the new one created by the mobile app.
