Edge 540 26.18 Gradient percentage works bad!

100% same for me! I was about to return my Edge 540 that I had been happy with, cycling hilly terrain multiple days a week. So it really just seems to be a software problem?

The same issue for me.

And - maybe related to it: when I'm on uphill with ClimbPro screen, being close to the hill top, maybe 50-75m, but still in the inclined part. Then, the climbpro gradient shows 0% and beeps that I'm done with the hill, while still having some distance to the peak.

I've found there's always been quite a disconnect from actual gradient, and previous garmin
eg where climb finishes
or gradient changes, but that was just out of sync

This issue i think is the instantaneous percentage gradient, Doesn't remotely match what the Garmin climb screen would indicate, on a section of climb what was 6-9%, the displayed figure was between 1-4%

Same voor 840. Read the thread there as well

I hope it is a SW problem they can fix soon but I don't see an official answer from Garmin.

It is a SW issue; there is an IQ app, Sensible Grade, that does the job much better.

Having the same problem here, I noticed this today on my Edge 540  Any official statement from Garmin?

Just noticed a software update, from 26.18 to 27.13 hopefully this fixes the problem.

Changelog mentions: "Improved altimeter accuracy with barometer outlier rejection"; does not look like grade percentage improvement to me.