After the Android smartphone starts up/reboots, the hearing aids do not connect to the Hansaton Stream remote app.
It is recommended to go into the Settings app on the Android smartphone (this will vary depending on which Android smartphone model) and turn off the Bluetooth. Wait 10 seconds and the turn the Bluetooth on.
Once Bluetooth is turned on, open the Stream remote app and the hearing aids should connect with the app.
If this does not resolve the issue, delete the Bluetooth pairing off the smartphone, then pair the hearing aids again to the smartphone.