are the problem pages at 100% zoom? is the monitor resolution the default? you could try changing that, then change it back to what you want. also, try playing with some of the accessibility options in system settings. as always, try a reboot as well...
Good thinking... but unfortunately I just checked, and yes, pages are normal zoom. And my resolution is the default 2560 × 1600 for my 13" built-in display.
Can you share some pages where that happens? I can test on MBA M1.
This happens
most frequently on google and bing search results pages (or maybe I just notice it the most there), but I've also had it happen on youtube... where I literally couldn't exit full screen, because I couldn't click the button in the lower-right corner. It also happens on the left and right youtube sidebars, where I've clicked the wrong video a few times because of it.
The thing is, the doesn't happen
all of the time. It crops up randomly, but I usually notice it after I've been using safari for a few hours, or have several tabs open.