title: Intermittent CORS errors with React and dotnet core 3.1
body: <p>We are getting INTERMETNT CORS errors with Google Chrome since their update last week.
  Hey On the CORS, we are getting INTERMETNT CORS errors with Google Chrome since their update last week.</p>
  <p>Our ops guy pushed a policy that ignores <code>Access-Control-Allow-Private-Network</code>  that seems to help, but that does not help for non-managed computers.</p>
  <p>Here is our policy:</p>
  <pre><code>services.AddCors(options =&gt;
  {
      options.AddPolicy(PolicyName,
          corsBuilder =&gt; corsBuilder.AllowAnyOrigin()
              .AllowAnyHeader()
              .AllowAnyMethod());
  });
  
  
  app.UseCors(PolicyName);
  </code></pre>