Flight tracks is out of sync

Hi,

First of all, thanks for this amazing open-data, it is really fun to play around with maps and flight data.

I am currently writing a "flight spotter" application, much like the one you have here: opensky-network.org/network/explorer

However, I am facing that the `tracks/?icao24=<var>` endpoint is returning paths that are out of sync of the the flights current route? Is there any limitations that I do not know of, or is it simple because of lacking data?

See the attached screenshot for example.

By inspecting the path unix timestamps, they occour around -1 day? Am I missing something?

Jan