If you want me to see what is wrong, show a screenshot of Left menu->sensor during such a period of connection problems.
What xDrip does has totally no influence of the contact of Juggluco with the sensor except that xDrip takes in memory and storage space what probably isn’t exhausted.
Librelink does only enables Bluetooth when it starts a sensor, so you can not later regain the Bluetooth connection. The patch Libre 2 app does get a Bluetooth connection with a sensor when a sensor is started by another app, but it’s alarms are disabled, so you can only sends it glucose values to Juggluco.
What do you want to do with that collector? Display the glucose value on multiple smartphones?