Even if your site was switched to mobile-first indexing, it doesn’t mean that Google will only crawl and render your pages using the GoogleBot mobile useragent. Google says they still send out the desktop GoogleBot to those pages to check on things.

In fact, JohnMueller from Google said there is like a 2-3:1 split between useragents. He said on Twitter “so when we shift to mobile first indexing for a domain, it’s 2/3rd mobile, 1/3rd desktop.”

He said it is totally normal to see a mix of useragents crawling your site. But when you are switched to mobile-first indexing, Google may crawl with both desktop and mobile useragents but will only show the indexed version, which is the mobile-first indexed version, not the desktop version.

Let me share all these tweets, so you see it in context:

Forum discussion at Twitter.