Good afternoon John and welcome back!
Thank you for reaching to us with this question.
I am unsure exactly why the after HTML is showing up twice. It could be for a variety of reasons, including:
- WordPress theme customization
- WordPress theme or plugin conflict
- Caching issue (wp rocket in your case)
- Legitimate bug
In order to be sure, I would recommend going through our Testing for Conflicts guide first and letting us know what your findings are.
But, if you are looking for a quick fix, you could try adding the following rule to your custom CSS.
https://gist.github.com/GeoffEW/07bee65f95281c56f4bd
Let me know what you find out.
Have an awesome day!
Geoff B.