We have a SquareSpace website that contains a group of social media links at the bottom.
The code for this block is:-
<hr>
<div class="sqs-block-content text-align-center"><h1>Share</h1>
<p><a target="_blank" href="https://www.facebook.com/sharer/sharer.php?u=http%3A//nataal.com/mrcy">Facebook</a><br />
<a target="_blank" href="https://twitter.com/home?status=http%3A//nataal.com/mrcy">Twitter</a><br />
<a target="_blank" href="https://www.linkedin.com/shareArticle?mini=true&url=http%3A//nataal.com/mrcy&title=MRCY&summary=Talking%20to%20Barney%20Lister%20and%20Kojo%20Degraft-Johnson%20at%20Glastonbury%20Festival%20about%20dancing%20into%20the%20light&source=">LinkedIn</a><br />
<a href="mailto:?&subject=MRCY&body=https%3A//nataal.com/mrcy">Email</a></p>
</div>
Twitter and the email link show, Facebook and Linkedin are blank lines. This is true of all 1000 odd pages in the site. Other browsers, Chrome and Edge for example, show all 4 lines.
This is a new phenomenon in the last 48 hours or so.