What plugin tags? Kunena Discuss plugin is enabled so that when someone first views a new article page, then Kunena automatically creates a forum topic/thread/post for that article and inserts the link with the comments area under the main article content. You can see it when you create a new article and then view that new article on the frontend, and then refresh the page. The Kunena forum topic link will display under the article content on that page.
One example is on my live site:
You can see the problem occur as I add new article pages in this section/category of my live site. This menu item uses a Blog category menu. Also, the articles have a "Read More" code inserted into the content just above the RL Snippet code in the article. That way the Blog menu page displays the intro article content and then the "Read More" link to display the full article with the RL Snippet text/content below the "Read More" section.
I noticed that the bug/conflict occurs when the Snippet is inserted just AFTER the "Read More" code in articles. Here is an example on my test site:
Here is the Kunena Discuss plugin link URL to the automatically created forum topic/post for this article. You can see the screenshots of the RL Snippets content is added above the page header and also in the forum when you click the "Recent Topics/Posts" you will see the RL Snippets content inserted into the author/user ID section:
When I create a test article and do NOT add a "Read More" code above the RL Snippets code inserted into the article, then there is no bug/conflict with the Kunena forum. Here is an example on my test site:
Here is the Kunena Discuss plugin link URL to the automatically created forum topic/post for this article. You can see the RL Snippets content is NOT added above the page header and NOT in the forum post author/user ID section when you click the "Recent Topics/Posts":
Here is the SU login to one of my test sites so you can try it out and see what I'm referring to.