Hi there,
I have a Mavic Pro and it has worked perfectly not until I recently found my forward sensor seems not working.
I tried to calibrate on my phone but didn't work.
So I tried on PC. Under the sensor status, the right forward sensor is blank, but the left one is working OK.
The calibrate screen also doesn't have the red square. (Normally it did have a red square to match with the green one.)

I can still fly my Mavic Pro manually. But it seems a bit drifting.

Any suggestions? All firmware is updated.
Thanks.

Sensor should not cause the drift. Turn off forward sensors than do a COLD IMU calibration and see if it help with the drifting.

Post 2 # is right, please calibrate the IMU first .As for the forward sensor, have you got any error message referring to the forward sensor? Have you tried to calibrate it on other computers? If yes, how is it going?

Hi, have you found any solution for this problem? I have the same issue... except in my case it is left sensor that is blank :/

Tend to agree, my first and only crash into  my garden wall, have it on vid.    Will post it soon.  Brakes failed.    Broke a prop.