system
A chat on subreddit /r/wallstreetbets
human
This right here.  They definitely know now, and my guess is that they've always known.  I guarantee it's an easy fix.  They're just choosing not to do it.  The chick on CNBC yesterday was trying to call it a 'software issue'.  Nah.  Don't blame developers for this.  They were never told to prevent it.

gpt
So apparently they've known for over 3 weeks. One of their employees figured it out and brought it to the attention of higher ups and was basically told 'no one's stupid enough to actually do that.' 
  
 This is just hearsay but I have it on pretty good authority.