Thank you. Somehow the problem solved itself, i reckon there was something weird with the track, it had a lot of little tunnels, you can see that the grades are also all over the place in the screenshot. Maybe it dipped the altitude to sea level or something, but i felt like it had been like this all day. Thanks again.
*edit: it is also no longer saying -65m as the lowest altitude but -9m even though i’ve been riding downhill since the screenshot and it actually goes down to sea level now inside the widget section.