I am actually monitoring SWA2521. From the ADSBx data, it is squawking 7500. From FR24 is is 2431. ADSB coverage in both case.. Is there any reason for that or is it a bug ? It may also explains why some other users reported seeing aircraft squawking emergency code and keep their flight path as planned...
I followed few flight this morning with 7x00 squawks appearing in red on my VRS instance. I was checking using FR24 to confirm, but it always seemed to be an error (no 7x00 squawk, no diversion). There is few reports on the forum already... There is also various strange results like -900 altitude and some aircraft flying but indicate altitude as ground (ROU1901 is above my head right now so I have been able to compare, just not fast enough to screenshot between ADSBx feed and my own). Not a major annoyance to be honest, it may even not be related to the JSON feed but with many reports it might worth an investigation when time allows it...