There's another thread about this bug in this forum, though nobody has bumped it in a while.
I just considered myself lucky for never having run into the problem, but it just happened to me for the first time about 5 minutes ago
. I had the tourney lobby up and was trying to click the "take your seat" button, but the button didn't appear for whatever reason.
The one piece of helpful info I can give is that I was sitting in 2 HUSNG lobbies at the same time, and I appeared to be sat by opponents in both of them simultaneously, though by 2 different players. Perhaps if 2 SNGs fire off at the same instant, there is a risk of one of them not opening? I dunno, just throwing out a guess.
Lock really needs to figure this one out.
For the time being, sitting second in a HUSNG >>>>>> sitting first, since it seems that the player sitting first is the only one who risks the game not opening.