They probably did it, but the winner was "unfavorable" to them, and they had to pay him. So they probably decided not to do it to save money.
As I said, to conduct the lottery they must publish the tickets list on twitter.
Since they haven't published the tickets list for round 11 yet, they haven't conducted the lottery at all.
Or are you saying they probably published the tickets list on twitter, conducted the lottery and then removed the post from twitter?
I highly doubt that. Note that the lottery is provably fair and once they publish the tickets list, there is no way for them to change the winner.