Entering a word in brackets and hitting preview shows all attachments ever uploaded
 

I'm running 3.8.2 and one of my users found out that if you just enter for example [isthisabug?] as the message body and hit preview, you see all your attachments ever uploaded as if they were attachments to your current post. Doesn't work when actually posting the text but still a weird issue.
Tried disabling random addons but couldn't find what would be causing this. As I'm currently very busy trying to prepare for exams I thought I might just ask here if anyone can confirm this. :)
I'd try it right here but I never uploaded anything on vbulletin.org and didn't want to spam a random thread.

[isthisabug?]

Well, I can verify that entering that text, going to Advanced Reply and hitting Preview did not show me my attachments. And, I can verify that is doesn't do a thing on my 3.8 test site either. So, I have no idea what he is seeing.

I'm seeing dead people :o

Anyways thanks for verifying, seems I have to poke through all my addons and modifications once the exam period is over. It apparently works for all users on my site so some of them see like 800 attachments in the preview.