<p dir="auto">Problem:</p>
<ol dir="auto">
<li>open <a href="https://www.openstreetmap.org/traces" rel="nofollow">https://www.openstreetmap.org/traces</a> (or any page with turbo pagination)</li>
<li>click <em>Older Traces</em> (or older whatever)</li>
<li>right-click the tab and select <em>duplicate</em> or <em>duplicate tab</em><br>
<a href="https://github.com/user-attachments/assets/de8e04a0-ee93-43f4-af52-4a60976c47cf">image.png (view on web)</a></li>
<li>you're going to see something like this<br>
<a href="https://github.com/user-attachments/assets/79ce95e1-fd3f-422b-9b8a-bad86d537098">image.png (view on web)</a></li>
</ol>
<p dir="auto">It's the turbo-frame contents, without header, footer and css.</p>
<p dir="auto">The same is going to happen if you:</p>
<ol dir="auto">
<li>open the traces page</li>
<li>click <em>Older Traces</em></li>
<li>close the tab</li>
<li>go to history / recently closed tabs and restore the tab</li>
</ol>
<p dir="auto">The reason for this is apparently the <code class="notranslate">Vary</code> header.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/openstreetmap/openstreetmap-website/pull/6112'>https://github.com/openstreetmap/openstreetmap-website/pull/6112</a></p>

<h4>Commit Summary</h4>
<ul>
  <li><a href="https://github.com/openstreetmap/openstreetmap-website/pull/6112/commits/eb069c12f3e40efceac85ecbe7e5e97c24997da4" class="commit-link">eb069c1</a>  Don't set Vary response header</li>
</ul>

<h4 style="display: inline-block">File Changes </h4> <p style="display: inline-block">(<a href="https://github.com/openstreetmap/openstreetmap-website/pull/6112/files">1 file</a>)</p>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/6112/files#diff-766c34fd6533171eaf54300c153f89d6002c35c02cfc9c5b219251f85180ad07">app/controllers/application_controller.rb</a>
    (1)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/6112.patch'>https://github.com/openstreetmap/openstreetmap-website/pull/6112.patch</a></li>
  <li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/6112.diff'>https://github.com/openstreetmap/openstreetmap-website/pull/6112.diff</a></li>
</ul>

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