I try to use a Sony MDR-XB950N1 noise canceling Bluetooth headset. It connects just fine with my Ubuntu 18.04 LTS but when I turn off my headset and reconnect some time later, it connects fine but it wont play any audio on it even though I selected this headset in my audio settings. I in fact have to drop the Bluetooth headset and re-pair it and then it works until I turn it off again.

Any advise on how to fix this issue?