I didn't realise you meant later on!
I have only free Strava, so cannot look at segment leaderboards, other than the 'all time' top ten (all/women/men) and none of those are from this year - you have to pay to subscribe to see 'this year' (all/women/men), today, following or by age, weight or club membership.
But I can see the map of the two segments that appear for the walk - they are the same route - one going easterly and one westerly, and (going west) it starts at the bend in the river by the bench, go along the (inland) towpath, follow it as it flicks up towards the road, but then turn left to rejoin the river path after the bend after the weir. So not hugely close to the river.
But yes, it is possible that Strava would log someone who is there. You can set your privacy controls so your results are not added to segment leaderboards, but if you have not done that, anyone with a paid subscription can see your best effort on that segment. On the free version it does not give the time the runner/walker did the segment, just the date and how long it took them
I would hope that someone who was by the bench and on the path to the west of it has come forward to say what they did/didn't see