When I tried to insert a pic in a reply to another post a few days ago, it showed the image in the editor, but wouldn't let me resize it. The image sizing box popped up, but then immediately disappeared. When I posted the reply, it showed as a link, which is now broken.

By contrast, I uploaded some pictures to my own build diary yesterday, and everything seemed to work just fine.

Using Windows Server 2012 R2 Standard and Firefox Quantum 65.0, if that's any help.