title: POST requests "stall" on Chrome
body: <p>I started noticing that post requests sent to our application server are getting stalled for around 7 seconds on the browser side for no discernible reason. </p>
  
  <p>Environment : </p>
  
  <ul>
  <li>Angular 1.4</li>
  <li>Play Framework</li>
  <li>Chrome 64.*</li>
  <li>Server sent events (SSE)</li>
  <li>POST request</li>
  </ul>
  
  <p>The number of TCP connections, as seen from the Chrome console, are around 3-4 at the time of stalling as seen in Network -> Connection Id</p>
  
  <p>If the user rapidly does around 4 UI operations that create a SSE subscription, followed by the POST, stalling is observed consistently.</p>
  
  <p>I'm not really a UI dev so any help debugging is helpful.</p>