A reader sent me a set of raws from a Sony/Zeiss 55 mm f/1.8 lens (Zony 55) on the Sony a7RIII.
The lower corners have a fair amount of astigmatism.
I would keep this lens. Some would send it back.
Jim
Mildly problematic 55 mm FF lens
Photography meets digital computer technology. Photography wins -- most of the time.