I have an issue where the 8th rank will never calibrate. It will stay lit and never change even when you place a piece down for setup. I did all of the basic troubleshooting like recalibrate, update firmware. There are no elevation issues, etc. I think it’s a hardware issue but not certain.
As you can see, all other pieces can be calibrated. None of blacks back row pieces (8th rank) will calibrate.