This has been "fixed" in the new website re-design by not using round avatar pictures anymore.

For the devs, here's a very quick'n'dirty fix for copy pasting (only tested in Chromium, but should also work in Firefox and others):

<a href="/home/user/usr_{UUIDv4}">

<img class="img-thumbnail rounded-circle" src="{THUMBNAIL_URL}" style="width: 65px; height: 65px;">

</a>

->

<a href="/home/user/usr_{UUIDv4}">

<span class="rounded-circle" style="border: 1px solid #ddd; display: inline-block; vertical-align: middle;">

<span style="width: 63px; height: 63px; background-image: url('{THUMBNAIL_URL}'); display: block; background-size: cover; background-position: center; border-radius: 50% !important; border: .25rem solid #1a2026;">

</span>

</span>

</a>