The problem appears to be Samsung's bluetooth software for the phone connection as the music connection works fine when the phone connection is off.
This is workaround that worked for me. Download a bluetooth app such as 'call to bluetooth' . I am a Samsung note 9 and land rover user.
I may have found a workaround. Since I got the car (2016 XF) I could only use music streaming through Bluetooth, if I tried to use the phone function as well it would connect and disconnect continuously. In Bluetooth settings press the 3 dots in the right corner, then advanced and there tick dual audio, untick media volume sync, untick ringtone sync and it should now work. For me it did. Also I should mention that under developer options, Bluetooth AVRCP version is set to 1.3, this might also be necessary.
I have a Samsung s8 and I am experiencing the same issues with Discovery Sport(I can only connect media or phone not both at the same time) - Are you saying that using the 'Call to Bluetooth' app worked for you?
Hi ! I have the exact same issue with my range rover evoque. After it went to my local land rover service centre, they said that the bluetooth on the phone is too far ahead of the car and land rover need to issue a fix. Also i have found a way that aĺlows music to be played and stops the cutting out by changing the permissions on your bluetooth for your car to music only and not calls. This way i can play music but not answer calls but it will do for now!
Hope this helps