Google may be testing dropping the more results button it launched this past April in the mobile search results and going back to paginated navigation at the footer of the mobile search results. Or maybe it is a bug?
Nati Elimelech posted a screen shot or two on Twitter showing the pagination feature instead of the "more results" button feature in the mobile search results.
Here is his screen shot:
Here is a full size that you can click into to enlarge:
— Nati Elimelech (@Netanel) August 19, 2019
I suspect this is a bug or maybe it is a test, who knows. It comes shortly after Google began testing, again, the more results button on desktop results.
Forum discussion at Twitter.