title: Dropped event because it is stale caused by minifyEnabled set to true
body: <p>I made some small changes to my android app (moved a library locally, upgraded gradle plugin to last, ...) and now if I use "minifyEnabled true", my app freezes at start:</p>
  
  <blockquote>
    <p>I/WindowManager: Input event dispatching timed out sending to
    net.myapp/net.myapp.view.mView.  Reason: Waiting to send non-key event
    because the touched window has not finished processing certain input
    events that were delivered to it over 500.0ms ago.  Wait queue length:
    5.  Wait queue head age: 5520.8ms.</p>
  </blockquote>
  
  <p>And if I touch the screen, I get:</p>
  
  <blockquote>
    <p>I/InputDispatcher: Dropped event because it is stale.</p>
  </blockquote>
  
  <p>Besides that, I cannot see anything in the logs.
  Setting minifyEnabled to false works. How can I find the exact source of the problem?</p>