We’ve noticed some Google Merchant centre accounts are getting vague processing errors over the last few days. In some cases this is causing the number of live items to drop significantly. We’ve had some success with resubmitting feeds to accounts where this is happening but new cases are still appearing.
If you are sending a feed to Google, be sure you have alerts turned on (see the “settings” area) or are logging in to the Merchant centre to check the feed regularly. If you experience a problem, resubmitting the feed is probably your best bet. This will only increase the load on Google’s system and potentially compound the overall issue but hopefully your feed will succeed.