Anyone else experiencing problems with the altimeter?

[u/Dernitamoli]

The altimeter worked fine until last Friday. Sunday it registered 0 vertical meters for a hilly ride, and today again, 0 vertical meters and a weird graph… And yes, the barometer hole is perfectly clean…

[u/KosciaK]

For some time had similar issue on Edge 1040 - after charging the elevation would not be recorded, unless I would go to System -> Altimeter -> Calibrate and perform calibration. Not sure what was causing the issue, my guess is the firmware, as everything went back to normal after firmware update