For the past two days I've been having trouble managing images in a post. Have you made changes to how the editing window manages images?
I used to be able to simply click on an inserted image to highlight it, resize it, drag it to a new location, or apply align right formatting (for example). Now clicking on the image doesn't do anything. Instead, to center an image, I have to highlight the image by dragging over it with my mouse. This makes the resizing dots appear. Regardless of what I do, I cannot drag the inserted and highlighted image to a new location in the post.
I recall during 2015 beta testing we had some of these same problems. Something changed?