I’m having the same problem, even with a very simple mock using the example code provided:
<!DOCTYPE html>
<head>
</head>
<body>
<a class="twitter-timeline" data-widget-id="600720083413962752" href="https://twitter.com/TwitterDev">Twitter Timeline Example</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>
</body>
</html>
Widgets are not scrolling on my site, either.
Thanks,
Joe