title: Firebase dynamic links not working for Firebase sign in with email link (password less)
body: <p>I'm using Firebase <code>sendSignInWithEmailLink</code> with the url generated as part of the Firebase dynamic link.</p>
  
  <ol>
  <li><p>The firebase dynamic url looks like:
  e.g: <a href="https://myapp.page.link/H1c4" rel="nofollow noreferrer">https://myapp.page.link/H1c4</a></p></li>
  <li><p>The url from step 1 is sent as part of <code>sendSignInWithEmailLink</code></p></li>
  <li><p>User received email and clicks on the verification link.</p></li>
  <li><p>At the end of redirection I can see that the url contains the oobCode as shown below:</p></li>
  </ol>
  
  <p><a href="https://myapp.page.link/H1c4?apiKey=" rel="nofollow noreferrer">https://myapp.page.link/H1c4?apiKey=</a>&amp;oobCode=YG2N2eLU4qGBsDeLU5cVsDrzF9qwkGzoUepInuA9pm0AAAFtfk41Nw&amp;mode=signIn&amp;lang=en</p>
  
  <ol start="5">
  <li>When my app receives the dynamic link finally, it is loosing the oobCode. My app gets</li>
  </ol>
  
  <p><a href="https://myapp.page.link/uEOBUnv1k4XclzwfsT5NXnGBgAA3/" rel="nofollow noreferrer">https://myapp.page.link/uEOBUnv1k4XclzwfsT5NXnGBgAA3/</a>
  The part after link/ is a custom data which I used while generating the link in step 1.</p>
  
  <p>When I use <code>isSignInWithEmailLink</code> for validating the link in step 5, I get the result as FALSE indicating it's not a valid email link.</p>
  
  <p>But if I provide the full URL from step 4 in the code(manually), the <code>isSignInWithEmailLink</code> returns TRUE.</p>
  
  <p>I think I've done all required but Firebase dynamic link is not persisting the oobCode as part of the link sent to the app on the device. </p>
  
  <p>Has anyone seen this and know what could be the problem? keen to get feedback here before reporting as an issue in Github.</p>
  
  <p>Cheers</p>