title: Using send_file weird file naming
body: <p>Rails: V6.0.0</p>
  
  <p>I'm using <code>send_file</code> to send a file from the server to the client. Filename on the server is correct and send accordingly.</p>
  
  <p>Code:</p>
  
  <pre><code>send_file service.file_path, filename: "test.csv", type: "text/csv", disposition: "attachment"
  </code></pre>
  
  <p>When it arrives on the client the filename has completely changed to: </p>
  
  <pre><code>test.csv_; filename_=UTF-8''test.cs
  </code></pre>
  
  <p>Anyone has an idea why this happens? Or what I am doing wrong.</p>