Hello,
FW 13.00 was supposed to fix the altimeter issue that appeared with version 12.00.
Well with this new FW, the situation is now even worse.
Calibrating the altimeter from DEM (or GPS) is still correct but the widget still not locks the value and shows inconsistent data.
I did a quite flat run at sea level;the activity showed 16,000+ meters of elevation and 500+ meters of elevation gain.
It also looks like auto calibration after GPS acquisition does not wok.