OK, that sounds like a successful test to prove that your phone is capable of communicating with the Hubitat Cloud Endpoint Server without any issues. This means, IMHO, that your hub is working fine with the Hubitat cloud server (i.e. is is properly registered.)
Understood. So, this would appear to point to an issue with the Hubitat mobile app on your particular phone. Are you running the latest version of the Hubitat Mobile App? There is an Open Beta for the Hubitat Mobile App which you may want to try, as they update the beta much more frequently than the production releases in the Apple App Store and Google Play Store.
