When you say it went away, I assume you mean it is not showing up on the “Favorites” section on Performance Overview page.
I think the person who favored it still has it as “Favorites”, but it’s not not showing up in your Stats because your Performance Overview page is set for “30 days” and it’s now longer than 30 days since it was favored. If you click on “All” (see screenshot below), you will be able to see the numbers that’s older than 30 days.
