Post ride climb stats missing

This is the second time it happens to me: I rode a course with 4 climbs in total. After the ride, the saved activity was showing only 2 out of 4 climbs on the map, with corresponding stats.

I love this feature (showing proper post ride stats and location on the map for each climb) but I cannot understand why some of the climbs are not properly saved.

I suspect this is a bug associated with changing the course during the ride (I did this in my last ride, but after having completed all the 4 rides...2 were correctly saved, 2 were not).

Am I alone with this issue?