I actually looked into this at the time and yeah there was definitely something weird going on with flightradar24 around that window. A few planes that should have been visible just weren't showing up properly, and I saw someone on reddit post screenshots before they got buried.
What gets me is the timing. You've got a massive chemical disaster unfolding and suddenly the airspace data goes patchy? Could be coincidence, could be a technical glitch, but it does make you wonder who benefits from not having a clear record of what aircraft were in the area and when.
Has anyone actually archived the flight data from that period? I'd love to see a proper comparison of what was logged vs what people reported seeing in the sky. If anyone has screenshots from that night please post them, this is exactly the kind of thing that needs people looking at it carefully before the evidence disappears.