Perhaps it's the lack of English or misunderstanding, but my friend & I were turned away shortly after 7pm - even though the stall looked fully operational.
Man: #1?
Me: Yes! How did you know?
Man: No, no more.
Then we blatantly see other people getting food from that exact same place. Yes, even a #1!
Not sure if they pre-ordered - probably not since it's a food court - but I couldn't help but notice that everyone that was being served were of the same ethnicity.
It would've been nice if they elaborated, like "We don't have #1, but we can make you #3 & #5", but we didn't get any explanation.
May go back, no where near closing tine, and write an update at that point!