Editting a forum topic returns HTML code in the topic title instead of the topic title

When someone tries to edit a forum topic the title is replaced by some HTML code.

In the edit form, the title is replaced by html code to render the unsubscribe button instead of the title. I can fix it when I need to edit a forum post but it is very confusing to my group members. Please see attached image for example of what is rendered in the edit form before any changes are made.