Yes, I have always gone the LibreOffice Writer route, with a copy and paste of the image. And even using the Upload button here to upload an image file incorporates the actual file name, which I suppose is a fail as well.
I wonder if the lost functionality has to do with the about: config adjustments I did a few weeks back. I implemented some of them, but also reverted some. There is one that affects the clipboard, but even reverting and restarting doesn’t seem to have an effect on the forum issue.
At any rate, I can’t even paste images using GNOME Web, which I haven’t tweaked at all. 