Googlebot Could Be Having Issues Crawling Many Siteground Hosted Websites
https://matttutt.meIt looks like multiple users are seeing that Googlebot is having a hard time crawling Siteground hosted websites, not sure when it started but some users are claiming they had products disappearing rapidly from Merchant Centre over the last three days. Siteground is looking into it, there is no ETA for the fix at the moment.
Other search engines like Bing seems to have no trouble.