It was reported earlier this week that the review stars began dropping out of the Google search results. It wasn’t even 24 hours later that the review stars began showing up again int he Google search results.
In a Google Hangout that was recorded on February 26, at the 56-minute mark, it was confirmed by Google’s John Mueller that they are coming back. He said that the reason they were dropping out of the search results were due to a bug. Google said that the bug is fixed, and that the reviews should be coming back.
There is a Mozcast feature report tool that shows that they are back to normal in the search results:
The drop in reviews initially began on February 16, but then began coming back a few days ago.