Android Template App: Problems with reconnection

[Hephaestus]

We are using the Android nRF toolbox v2.4.0 and have successfully implemented the Template app. The app will reliably connect with our device and functions well. The only problem is when we disconnect.
After a successful connection and disconnection, when the Connect button is pressed and the list of "Available Devices" is shown, our device is not shown.
If I restart the app, our device will always be listed.
Sequence:

1. Press Connect. Our device is listed on the Available Device page.

2. Choose our device. Connection is successful.

3. Disconnect by pressing the Disconnect button. Disconnection is successful.

4. Press Connect. Our device is not listed.

Rebooting our device has no effect on this issue. The mobile phone is a Nexus 5X with Android 7.1.1. The device is running an nRF51 with BLE 4.2. Thanks.

[FormerMember]

When the phone disconnects from the device, could you double check that the device actually starts to advertise? Do you see the same problem if you use nRF Connect (Android)?

[Hephaestus]

@Kristin. Thank you for the response. Using the nRF Connect app (Android), I can connect and disconnect repeatedly without a problem. Also, if I do the following:

1. Press Connect. Our device is listed on the Available Device page.
2. Choose our device. Connection is successful.
3. Disconnect by pressing the Disconnect button. Disconnection is successful.
4. Press Connect. Our device is not listed.
5. Reset/restart our device. Our device is still not listed.

If our device had stopped advertising after the disconnect, then I believe that it will reengage advertising after the reboot.

[FormerMember]

Which phone, version of Android, and version of nRF Toolbox do you have?

[Hephaestus]

Android SDK is nRF toolbox v2.4.0. The mobile phone is a Nexus 5X with Android 7.1.1. The device is running an nRF51 with SDK 12.1 and BLE 4.2.

[FormerMember]

I just tested here with Nexus 5X, Android 7.1.2, nRF Toolbox v. 2.4.0 --> Template, and nRF52-DK, SDK12.1 -> ble_app_hrs, S132 v.3.1.0, and it is no problem to reconnect the nRF52-DK..