<p>I kept on getting logged out of OSM for no apparent reason, and have narrowed it down to this:</p>
<ol>
<li>Log into openstreetmap.org with Safari 12</li>
<li>In a new window/tab, go to osm.org (<em>not</em> openstreetmap.org)</li>
<li>Return to the original window/tab and refresh</li>
<li>You are now logged out</li>
</ol>
<p>It appears to be a Safari 12 thing. Safari 10 is ok, Chrome/Chromium and Firefox too. My guess is that this is a side effect of one of Safari's anti-tracking behaviours but who knows.</p>
<p>I realise this is probably difficult to debug without access to a Mac, so am posting the issue mostly in case anyone else encounters it and can see what's going on. Happy to provide request/response details from the console if useful.</p>

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