- Log in to the Arabic Wikipedia and enable the Visual Editor.
- Click the "Sandbox" link in the personal bar ("ملعب").
- If it's red, create a draft page and save it. While creating it, a message saying "You are creating a new user page" will be shown—this is correct.
- Edit the draft page.
Observed: A pop-up is shown saying "1 notice" ("ملاحظة واحدة"). There is nothing else in it, so it is useless.
I cannot reproduce it in the English Wikipedia, only in Arabic.