Earlier quoted context omitted.
I've had similar observations with different behaviors in Safari and Finder. One would think the quality of Apple's software would be increasing with the usage of Swift over Objective-C, but the opposite seems to be true.
There are like a half-dozen blatant bugs I encounter between daily and weekly in Safari. Text input and textarea editing is buggy in a couple ways, Apple Pay has a positioning bug where sometimes its bottom button is about 1/3 off the screen, certain elements on a couple pages smear when I scroll (but only sometimes). Not even counting ways the keyboard itself is worse now. I haven’t seen browsing this buggy outside…
This bug is so blatant that I assumed my would have been fixed by now, but no.