I have that exact adapter from amazon.co.uk and using the cable that came with the OPPO HA-2 and it does not work with my Nexus 6P, all options set correctly, works fine with devices that are natively micro usb though and works fine with my ipod Touch with the lightning cable. So unless amazon.com sells a different one than amazon.co.uk even though they both the VicTsing ones, I have noticed that they have upgraded their design, so maybe the ones they make now just do not work.
Please can you guys make a usb c cable and sell it as an accessory, plenty would buy it
The only other success I have heard with cables is when somebody custom makes them and they seem to sell out very quickly, ideally we are better off if Oppo makes and guarantees them etc.