A few weeks ago, I was editing a post in the WordPress Classic Editor (WordPress v4.7.1). After about 2 paragraphs, I accidentally touched the trackpad on my laptop, or did something with the mouse, and then noticed that the editor was behaving strangely. As I was typing, the new text was appearing in a right-to-left direction instead of left-to-right direction.
My first response was to check the INS/DEL keyboard keys, but that did not correct the problem. I then copied the text into a new post, but the problem remained. I then switched from Visual mode to Text mode in the WordPress post editor, and saw some extra elements in the paragraph tag (like the ones in this W3Schools page). When I deleted all the extra text in the paragraph tag, the editor started working as expected again.
Has this ever happened to any other WordPress user? I would like to know….