HP206c - inaccurate altitude


I am just after receiving a HP206c sensor for a GrovePi +.
I have tested the high_accuracy_barometer_example.py script and did not experience any code runtime issues.
However I am getting some weird Altitude outputs, as per attached screenshots.
The first issue is that it displays a crazy altitude of 42949653 meter, I am not sitting on a plane right now :sweat_smile:.
The second issue is that, even when keeping the sensor stand still, the next measurement would have 2 meters difference from the one taken 2 seconds earlier. For a high accurate barometer, I would expect a few cm delta but not meters.

Thanks for advising.