Hello. My site's Google traffic plummeted when it auto-upgraded to WordPress 3.8.3 on April 15th. No major activities in my site happened that time except for the version update, so I'm assuming it's the primary reason for my site to get de-indexed. My posts totally disappeared from Google search results beginning April 16th, and my traffic hasn't recovered up to this writing.
Is there any way to avoid getting de-indexed by Google when WordPress auto-updates to another version? Thanks. :)