This issue did resolve it's self for me.
I have not had this problem again since.

I also have this problem.
It happens a few times a day. It's not the biggest problem I've ever encountered but I worry it will get worse. It sometimes feels like touching the thumbprint sensor may cause this glitch but it could be coincidence

Hi, just got my BV9800 pro about a week ago and love it but I'm having the proximity sensor problem. I've followed the "dial *#87# to open the factory test menu tap MMI1>single test>Distance Calibration" But my phone fails the test every time. I have removed the screen protector and still ...