title: `the page is being unloaded` error
body: <p>I was working with a NodeJS-ReactJS Isomorphic App, and when I click on a <code>Link</code> I'm getting an error saying </p>
  
  <p><code>Uncaught (in promise) Error: Request has been terminated
  Possible causes: the network is offline, Origin is not allowed by Access-Control-Allow-Origin, the page is being unloaded, etc.</code></p>
  
  <p>The first two reasons (offline and CORS) I heard about. What is the <code>the page is being unloaded</code> error means? How it may cause the browser not navigating to need.</p>
  
  <p><a href="https://i.stack.imgur.com/lSmh8.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lSmh8.png" alt="screenshot"></a></p>