My profile has disconnected from my bike while I am using it, what should I do?

Since their latest updates, Apple and Google's OS have limited the use of data and bluetooth when your phone is on standby.

So, you should activate the use of data and bluetooth for the Angell app in your confidentiality settings, even when the app is in the background (i.e. as soon as you are not using it, but it is in your pocket while riding).