Email post changes plugin is not highlighting changes properly

We have seen that a few times the Email post changes plugin doesn’t highlight the changes in the notification emails properly. This although happens less frequently but this is making editing very difficult.

I have tried to play with it by inserting random html tags (<p>, <a href , img) within the content body and I am able to replicate it. The tags I did were broken tags like:

<p>Related: <a href=”https://www.abc.com&#8221;
<a target=”_blank” href=1235#”
>General election 2017: Paul Nuttall launches Ukip’s campaign – live</p><p>Of the many reasons Theresa May supplied for calling a general election,

Is anyone facing the same issue or the plugin owner please can you highlight the behavior with respect to broken tags and broken change notifications?

Also if there is something for content editors to know to make this plugin highlight changes properly?

Thanks
Prashant