Since several firmware updates my altimeter is basically useless. My home location is at around 500m altitude. Even when i calibrate manually it jumps right back to around 1000m right after calibration. The wierd thing is if i calibrate to around 1000m it stays there but everything lower will jump approxximatley 500m after calibration. I wonder if someone has the same issues or if im having a hardware defect (wich i dont think because the relative elevation increase while hiking seems correct, its only 500m off)