The problem with this is that I have no control with NoScript. I don't own the code for XenForo so if there's a NS/XF thing going on all I can do is keep asking at XenForo.com about it. There's a
thread about it on XF, but it only looks like there's a ticket open with NoScript itself and only talks about video embedding, which I think is the same thing which you are talking about. I sent the guy a message who sent the ticket to NoScript, but have yet to hear back.