If I remember correctly, there is a start and end point for each segment, and the requirement that your route falls on or near 80% or so of the remainder of the segment.
You would have thought that the longer the segment, the easier it would be to meet the 80% requirement, and the lower the chances of GPS error ‘robbing’ you of a recorded time.
My best guess is that whoever created the segment had a minor GPS glitch which shifted the start or end point away from the normal ‘line’ on the track or road in question, even by only a few metres.
Only those few people who had a similar error at the same moment on their route would therefore hit those points as Strava sees it. Hard to tell by just looking at your line on the map provided.
That’s the thing with Strava – you have to take all the ‘results’ with the assumption of a fair degree of inaccuracy. People with different devices riding side by side on the same climb can record wildly different times.