You missed what I think is the most interesting question: why does the bug appear in Safari macOS but not in Firefox, Chrome, or WebKit running inside of Playwright?
(Dozens of people in this thread implying that any web dev should have known to solve it with overflow-x: hidden and not one of them have addressed that browser difference yet.)
I think any web dev knows not to question browser differences if it can be fixed without opening that can of worms.
Safari has some differences in default scroll behavior. I’ve seen similar bugs pop up many times.
people pay good money to not have their shit rendered via Playwright!