There's obviously some sort of buggy stuff going on since the most recent Safari update. Maybe it's not happening on your devices, or a million others, but it's happening on who knows how many others? Ever since this update, lots of websites that previously worked fine, are no longer doing so! I click on a link, and the page goes blank, which had happened even to this website! I kept trying to log in, my auto-fill little window popped up, I clicked on the "use the password from this site" option, and then the whole window would go blank! Over & over, until finally I manually wrote in my administrator password, which I've not ever had to do. Other sites aren't opening, or all the copy on the page would vanish, etc, etc. Updating the OS to 11.7.6, and Safari to 16.4.1 have brought all this weird behavior on. I'd installed nothing else. The OS update actually did fix something that wouldn't let me open the Text Edit app (& had been told by someone here, it would only work if I update to Ventura (which I do plan to do pretty soon, but obviously that was not why Text Edit wasn't working).
But while it fixed that, it's made browsing and interacting with sites a royal pain...