Bet you dollars to doughnuts that trigger has been altered in some way.
You've got a first hand account here from a respected member. You've got a video with a guy demonstrating the problem who states he hasn't altered the rifle, and he can repeatedly make it malfunction. You've got a link to sworn testimony from a former Remington engineer who says he was able to consistently repeat the malfunction on numerous test rifles.
I think it's fair to say you are prepared to disbelieve anyone who isn't you.