If you mean by "no results" that the segments aren't shown then you should open the activity in the Web Browser. There is a section "Show xx hidden efforts" under the segment list, maybe you will find them there. If not, then it's mostly due to gps abberations. These cases are viewable at much the same place with the link "Don't see the segment you're looking for?".

Thanks for your remarks.

Ik know how you tot see the 'hidden segments'

The issue is on this climb, there are several segments, some are covering the whole climb, others parts of the climb.

In some segments, I find myself, in other I can't. Like I didn't passed this segment. It's even more bizarre: several segments cover the whole climb, in some of these, i find myself, in others not.

Please check my reply to this similar issue, and see if it applies to your situation.