Please see https://wpforo.com/community/postid/56329/
I have both Advanced Attachments and Tenor GIF addons installed. When Tenor is activated, the GIF icon doesn't show in the new topic form but it does show in the reply form. Also, when Tenor is activated, the attachments links are not displayed below the new topic form, but they do display under the reply form.
All attachments work great if Tenor is not activated.