It looks like the composer preview is adding one extra newline after an image but cooked post content looks fine as you can see below:
I have not added any space after this image
I have added a single newline after this image
But when you’re composing / editing this post, you’ll see one extra newline being added:
I’m noticing this because it only started happening sometime in the last few months. As someone who uses lots of images in posts, it bothers me a little bit when the composer preview looks different from the actual cooked post content.