title: Xcode files disappear from project navigator
body: <p>I'm running into a strange Xcode issue where files that match my search are disappearing from the project navigator.  With only 1 tab open in Xcode, I type a few letters into the search box in the project navigator.  The list of files immediately filters to match my search term.</p>
  <p>I then do nothing, and wait for 5 seconds, and Xcode refreshes and the files disappear and it displays &quot;No Filter Results&quot;.  If I add or remove a letter from the search box, the files come back for a few seconds, but then they disappear again.  Is this some Xcode glitch? Or do I have to change something to get my files to stop disappearing when I do a search. I am on Xcode 7.3.1.</p>
  <p>None of my other navigator tabs have any text in the search boxes. I also do not have the 'source control' or 'recent files' filters selected, as shown here:</p>
  <p><a href="https://i.stack.imgur.com/ltbyQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ltbyQ.png" alt="enter image description here" /></a></p>