I have the international version of mate20x and after receiving the final update 172, the proximity sensor does not work more correctly. When I receive a call, when I answer it, the screen turns black as if I had put the phone to my ear. If I unlock the phone, it asks me not to obstruct. Testing with an application, it shows that the sensor is locked. Just by running your finger over the sensor several times, it works again. But if you put it in your pocket for a moment, it comes back to lock. Version 184 came out today and the problem continues. Any idea?