HOWEVER the software fix has corrupted the Bluetooth connection between my phone a One+ 6T and the car. If I receive or make calls in the car the other party getv a loud screaming noise and can not hear me =- I hear nothing.
I have exactly the same problem with a Moto G7+ since the recall update which also updated the kernel of the infotainment system to the Aug. 24 version. Calls can be managed through the car, but I don't hear anything and the other person only hears weird noises. Audio playback works, though. The same is true for another app I'm using which can either connect through Hands Free Profile (HFP, Phone) or Advanced Audio Distribution Profile (A2DP, Audio) to connect to the car. Sound is played on A2DP, but not on HFP, although the connection is displayed as an incoming call.
Resets on both sides didn't help, neither did reparing the phone or resetting the Bluetooth/Network settings on the phone. The weird thing is, it works flawlessly with an identical phone with the same software version which has never been connected to the car before.
After checking the car with Bluetooth Scanner, I found that the AAC codec is gone. Not sure what to make out of this. Maybe either side 'remembers' that this connection used AAC before and does not fall back to the SBC codec. As I cleared the Bluetooth/Network settings on the phone, my bet is on the car.
According to a user in the german forum, a factory reset of the phone fixed it for him, which I am still a bit reluctant to do as a new phone with wireless charging is already ordered.