Instant pace difference with overall statistics
i have done a run and when I look at the results via the website I see something strange. The statistics screen shows a lap pace average of approx 5:06 minutes per km. I am pretty sure that is correct. However, when I look at the pace line in the figure below (the green line) then it shows a rather steady pace of approx 5:20 to 5:25 per km. I am very sure that is not correct.
I see the same effect in de Sports app on my mobile.
I can understand that there is a small difference in instant pace and average lap pace, but not that it is that big difference.
Why do I get this difference in pace?