bbPress.org

This is a common theme issue related to the theme styling absolute positioning the comment reply link for WordPress comments.

Use this custom css to fix the issue. Add it in your child themes style.css file or anywhere you can add custom css like in a custom css plugin.

#bbpress-forums .reply {
    position: relative;
    top: inherit;
    right: inherit;
    line-height: inherit;
    font-size: inherit;
}