Interesting that we seem to find SARS-CoV-2 circulating in animals from reverse zoonosis(humans to animals), but we can't find any precursor virus circulating i

Interesting that we seem to find SARS-CoV-2 circulating in animals from reverse zoonosis(humans to animals), but we can't find any precursor virus circulating in any animals that would explain the zoonotic spillover in the first place. It's as if the virus vanished in whatever intermediate host after infecting the first human like some sort of immaculate infection event!