Google tests centered sponsored results heading on desktop

Google is now testing showing the sponsored results heading in the center of the page on desktop. Previously, it was on the side of the results page. It might be a new test or might be a bug, but I saw this for the past 2 days. I was thinking it could be a bug, but it kept showing up again and again, so it’s worth sharing here.

Here is a screenshot of how it looks.

Showing the heading centered on the page can catch user attention, but I don’t think it can impact more than that. I think this can be a bug.