Fenix 5 elevation drift after update to 5.40?

Hi
I've had the my Fenix 5 since june. Upgraded from a Fenix 3 non-HR.
When I first got it, I experienced quite a lot of elevation drift while not moving (upwards of 50-100m in a few hours) - an issue I didn't have with my F3.
However, it got updated quickly and seemed to fix the issue, and only drifted a few meters during an entire day at work.
Now, since 5.40, it's back to drifting - and just today, it drifted 40m during the night, while laying on my bedside table.
A few times it's even bumped my elevation from 200 to 900 m within minutes.

I can't seem to find anyone else with a similar issue - so I'm asking here, as I'm getting tired of having to check and calibrate the altimeter several times a day to stay within reasonable elevations.

0 jeyurkon over 7 years ago

I have the same problem. What I find odd is the elevation drifts up as the barometric pressure increases. I would expect the opposite.

0 KrapfenKringel over 7 years ago

I'm on 6.0 and the watch drifted 100m in height after a huge storm, while I was at home not moving much. I thought the watch was better in distinguishing air pressure and real height before.

Also calibrating the height also changed the air pressure, shouldn't they be calibrated interdependently?

0 Former Member over 7 years ago

Same issue here. I thought that's what the auto mode was for

0 Former Member over 7 years ago

I am having the same issue with my Fenix 5. I had the same problem as well with Fenix 3 HR.
Suddenly altitude starts to rise without the real reason and if I calibrate altitude to the correct value then air pressure at sea level will be totally wrong.
It will behave strangely hours or even days and then it might be back to normal until the same happens again.
I have a feeling that this problem occurs in every Fenix 3HR and Fenix 5 watches at some level.
At least all the units I have had have suffered the same issue ( 3 pcs Fenix 3 HR + one Fenix 5).
I am willing to know does somebody own a functional unit (I mean it works correctly all the time)?
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