I can upload an image to a page, but, once there, I have no control. I click on the image, and the edit box does not appear. When I release the click, I am moved to another part of the page.
Thank you for reporting the problem. It looks like it isn’t a common issue ever found in Sydney site. I am not really sure if it’s a theme-specific issue. To help us verify this, try temporarily switching the theme to one of the default ones like Twenty Seventeen. And then run your test.