
Google’s webmaster trends analyst John Mueller has confirmed on Twitter that there is a reporting glitch with the crawl stats “time spent downloading a page” report in the Google Search Console for the dates February 20 and 21.
There was a massive dip in the number being reported on those two days, but that dip was just a glitch in the reporting. It does not reflect actual crawling or search rankings.
Here is a screen shot that illustrates the glitch:

Mueller wrote:
If you’re seeing a weird drop in the Crawl Stats in Search Console for a day last week, that’s a reporting issue on our side which you can ignore. Sorry for the confusion & hope your week otherwise starts off great!
Here is the tweet:
http://feeds.searchengineland.com/~r/searchengineland/~3/n8ocuakIW6Y/google-confirms-bug-crawl-stats-time-spent-downloading-page-report-293026



