title: SharePoint 2013 in place search issue
body: <p>I am doing an in place search in a document library and results are being returned just fine.  However, some users are reporting seeing the following message: </p>
  
  <p>Some files might be hidden. Include these in your search</p>
  
  <p>I also receive this message at random times for different searches.  There seems to be reports of this on various boards with no real answer.  Anyone know why this message would occur?</p>