Thanks, I'm able to access the correct file now
I'm able to replicate the issue now, as you make the content length to shows all
I've make temporary fix in the file:
.../components/com_easysocial/themes/wireframe/streams/articles/preview.php
from
<?php echo $article->content; ?>
to
<?php echo strip_tags($article->content); ?>
I've logged this issue in our issue tracker and our developers will take an action for this