>>/7114/
It's clearly an interpolation artifact (if real at all).
That's how these webpages using ADS-B signals work, and being a regular visitor to fr24, and having considered buying one of their ADS-B receivers (or building one myself), I am 100% sure that this is not real.
Wouldn't even have bothered to reply in last thread as it had been dismissed back in /qr/ already.
But since "droneanon1375" is the one who invoked "ley lines" as well, the opportunity was just too tempting .....