Thanks for your patience while we investigate this. We've done quite a bit of testing and we don't think SSL is the issue. It actually looks like a change in how Joomla handles language string redirects.
The good news is that I think the issue should be easy to fix from our testing. If you're up for a quick code change on your site to test, we'd love to hear your feedback. If so, please edit the /libraries/sourcecoast/openGraphPlugin.php file. Around line 472, you should see:
Update that to:
if($sef->code == 303 || $sef->code == 302)
Test that and let us know if it resolves the issue. If so, we'll absolutely include this in the next release.
Thanks!
Alex