With the latest software version (27.09) the altitude is completely wrong.
Values vary from -4000 to -8000.
If I use the calibration option using the GPS it shows the correct value than after calibration has been completed it continues to show the wrong value.
If I disable the automatic calibration ("Calibrazione auto"), after calibration with GPS it shows the correct value for a few seconds than starts to update the value going back to -8000.
Trekking sessions are impacted but also the running ones if you enable 3D distance.
