Ground Traffic Appeared then Disappeared

[gtj0]

There was just a post about this recently…

TONS of new flight info that disappears

Hi - new to the forum, have had a PiAware up for a couple of years. I recently bought the FlightAware 1090 MHz ADS-B Antenna and mounted it up higher than my old antenna had been and have seen a lot more traffic. Every once in a while, my list of flights will burst to include LAX (I’m down in San Diego) with a bunch of ground readings. I’m wondering if this is “normal” and what I’m really seeing. I can’t imagine that my reception changes much, and even if it does, why do I only see ground in…