title: Nginx CSP frame-src ignored
body: <p>I have an Nginx CSP configured as follows:</p>
  
  <pre><code>add_header Content-Security-Policy "default-src 'self';script-src 'self' 'unsafe-eval' https://www.google-analytics.com/analytics.js;img-src 'self' https://ssl.google-analytics.com data:;style-src 'self' 'unsafe-inline';font-src 'self' 'unsafe-inline';frame-src 'self' https:;object-src 'self';connect-src 'self' ws:;media-src 'self'
  </code></pre>
  
  <p>When I try to load a page in Chrome I see:</p>
  
  <pre><code>Refused to frame 'https://myexternalwebsite.com/a/b/index.html' because it violates the following Content Security Policy directive: "default-src 'self'". Note that 'frame-src' was not explicitly set, so 'default-src' is used as a fallback.
  </code></pre>
  
  <p>In my CSP frame-src is clearly set and has the values 'self' and https:</p>
  
  <p>What could I be doing wrong?</p>