Follows these steps to delete and re-add the image to force the HTML to re-write.
  1. In the WYSIWYG editor, position the cursor just to the right of the first image where the problems occur
  2. Delete the image using the Backspace key
  3. Re-Add the image using the "undo" feature [CTRL+Z]
  4. Reset the image URL using the Insert link button
Repeat for each affected image.