Mobile BLE is disconnected from IOT device after ~120 seconds

Mobile
1

Hi
I have an IOT device that connect to the mobile with ble
I am testing is stability and when working with the mobile and it device the ble connection is lost
A restart of the app is making the connection again (automatically paired )
But it looks like the phone or app is closing the connection after ~120 minutes

2

Try restaure default your device and try again.