I initially tested created this post through email (with an image). But apparently the new post editor (recommended) cannot edit this post. It just sits with a spinning icon, attempting to load the post for editing, possibly because of the image. Thankfully the post can be editing in the old post editor, as I am doing now. So I can use the newer post editor, but expect that some posts (especially by email with text) will need to be edited with the older post editor.
UPDATE: Apparently the newer post editor (yes recommended) cannot edit ANY posts. Here is all it does: