Could this be just a kernel issue? I had Flyme installed on my Pro 5 for a couple a days and I did not reflashed the whole system, just restored it with TWRP and yes, Android Flyme latest stable had suddenly an issue with a noise and distortion when using a Bluetooth. Then I realised that I have not reflashed it ,just restored it. Then I flashed the Flyme update and again restored the image with TWRP and problem with bluetooth has gone. So it might be a worth to look on kernel, files it contains and the configuration.
Could this be just a kernel issue? I had Flyme installed on my Pro 5 for a couple a days and I did not reflashed the whole system, just restored it with TWRP and yes, Android Flyme latest stable had suddenly an issue with a noise and distortion when using a Bluetooth. Then I realised that I have not reflashed it ,just restored it. Then I flashed the Flyme update and again restored the image with TWRP and problem with bluetooth has gone. So it might be a worth to look on kernel, files it contains and the configuration.