Also, I was following it on FR24 and it was present – just vanished on landing which is strange.
Contrary to popular belief apps such as Flightradar aren't all seeing, all knowing...
As goeasy says flights suddenly disappearing is not strange at all.....app coverage, especially at low altitude depends on the availability of local receiver coverage. For example we don't have many spotters in our part of the world so as a result at our locali'sh provincial airport it is quite a common to see a flight disappear off Flight radar as it descends through maybe 500-1000 feet and goes below the radio "horizon" of whoever the local spotter is who has their receiver switched on and connected that day.
In flight, FR24 suddenly showed 2 forward flight paths for the same aircraft - never seen that before.
For reasons that I think some have explained previously, on this thread or elsewhere, FR24s and some other tracking apps destination info and route depiction can be highly unreliable at the moment...nothing sinister, no conspiracy, just a consequence of the way some of the apps use historical info get some of their information and the fact that due to the disruption flights are not necessarily following their habitual routes.