Yesterday we all of a sudden heard from multiple users who were having issues with their BlackBerry 10 sensors. Our own Jay is having issues with his orientation and light sensors. I was trying to dig into this from my end but my buddy Adam @CrackBerry also noticed this sudden influx of sensor issues for users on OS 10.2.
Let us know what you are seeing on your device and your OS version. Check out this thread on CrackBerry where they are trying to correlate the reason.