We use BNO055 on a custom PCB. We have several PCBs and I found that, in some of our PCBs the GYRO does not start after power on. The CALIB_STAT register shows 0 at GYRO part. When a PCB shows this phenomena that never turns on correctly (seems the BNO damaged). But, in the other PCBs it works well. We found that, it is always the GYRO sensor that sometime fails to work. Have You faced the same problem before? Any Idea?