Yes there had been some A7III with premature shutter failures, and yes in NJ there was a class-action suit over it.
But also know that the A7III is the largest selling single fullframe mirrorless camera in the world and most folks have had extraordinarily reliable and superb performance with it, pros and amateurs alike . Those stories dont make the forums, only any failures or issues.
I personally have owned Sony A6500, A7RII, A7RIII, A7III, A9 and now own A7RIV, A1, A7SIII. I have made hundreds of thousands of professional and personal shots with these Sony cameras around the world without a single camera failure, ever. Never had an issue with my A7III.
In my 40+ years history owning Nikon and Canon gear (both brands) I did experience the occasional camera failure in both brands of gear. No camera brand is immune to this, NONE. And no single camera model is ever without some issues.
My advice, try to talk with the Sony sales rep for your area (your dealer can direct you to that person). I have found them to be more directly responsible to consumers.
Your issue needs checking out. Call Precision Camera in Enfield, Connecticut , they are a major Sony authorized repair facility. Maybe they can diagnose your problem better.
https://www.precisioncamera.com/Best to you.
Yes there had been some A7III with premature shutt... (