Steps to Reproduce:
- Go to https://ar.wikipedia.beta.wmflabs.org/wiki/%D9%86%D9%82%D8%A7%D8%B4_%D8%A7%D9%84%D9%85%D8%B3%D8%AA%D8%AE%D8%AF%D9%85%D8%A9:Whatamidoing_(WMF)?dtvisual=1
- Click the "Reply" button.
- Switch to visual mode.
- Type something.
- See your text on the left side of the box.