Third refresh, most of the missing images show to one degree or another. I can see the tops of two very, very slowly loading.
Once they are cached on your computer they will pop up without burdening the internet with having to fetch them from the original source.
That’s caught me several times. I’ll see an image I’m posting as my cache copy, even when the original source is no longer there.
Just a dreadfully slow fetch, you need do nothing at this point.
Computer restart?