Calibration: Front sensors (black area of the pie chart) never gets activated on the graph


#1

Which one is it?
A. (Black sensor defective) The black sensor is never “active” graphically on the calibration.
Does it mean the calibration goes on without this sensor? Is it defective?

Or
B. (bug in calibration feedback) Since the calibration is complete it means that ALL sensors are doing their job as expected…