title: Very strange iPhone app crash problem with tabbar based app
body: <p>I know the title sounds a bit awkward but let me explain my problem.</p>
  
  <p>I have a tab bar based iPhone app which works perfectly so far. I can switch through the tabs and every tab loads a view controller.</p>
  
  <p>But here is how it crashes. After I used the app and working with a bunch of other apps I switch back to my app (for example after one hour). The app shows the screen where I left it. Now when I try to change the tab, it crashes immediately.</p>
  
  <p>The problem is that I can't reproduce this crash in the simulator or in the debug mode. I tried to open it, then close it, then reopen it but then everything works. Only after a certain amount of time the crash can be reproduced. But I don't have any logs.</p>
  
  <p>Maybe anyone had the same the problem and knows what to do here?</p>