The airfields have anomalies in the UK too, so far I have spotted - (a) No asphalt on the runway at Shoreham (b) A floating runway at Brize Norton - see screenshot (c) A concrete runway where I think there could be a grass farm strip near Venn Mill (between Abingdon and Wantage) - see screenshot
Just spotted another "ghost" airfield at Freshwater Bay, IOW. I'm guessing this has been created by an autogen function which currently does not refer to ICAO codes.
I have more evidence that a rogue autogen runway create function is currently active, I flew to the now disused Abingdon airfield and found that FIFS has runways created as per the screenshot, I guess it isn't too clever at getting the widths right!