I have a pair of bluetooth headphones (Andoer LH-811). Connecting them to my Ubuntu 16.04 they work only in Headset Head Unit (HSP/HFP) mode. If I go on sound settings and try to switch to High Fidelity Playback (A2DP Sink) it automatically brings me back to the laptop's speakers.
Note that on the same laptop but with Ubuntu 16.10 I don't have this problem.
How to make them work?