Not sure if this is related to the above, but for a few weeks now the page, or parts of the page, or even part of the logo is appearing blank/white. It’s happening here as well as my own forum.
Happened again (this time on my forum) I was scrolling down the page and most of it vanished, paused and waited a bit but no change so screen grabbed it and continued scrolling which then brought everything back.
I can reproduce that on meta using Safari just by randomly selecting topics. It happens at least 1 in 20 times. I don’t see any significant errors in the console. It goes away when the title wrapper scrolls into view.