I've never had this happen before. I clicked around to other threads, and as far as I can tell this only occurs when a post has a numerical list in it, where the post continues outside of the main box and off screen. Hopefully this screen shot will post.
Sorry we missed this, Paul. I noticed it in iOS, too, with the same post. I went in and looked at the post and it appeared that the formatting may have been copied/pasted from outside of MP, which can cause issues. I reformatted the lists with the provided list tool and that seems to have helped. Long story short, formatting from a different text app doesn't copy/paste well into MP forum posts.