Well it might be less broken than before but sure isn't "fixed" yet. I tend to get several group invites at the same time now and have to decline several after group is formed. The other day I got kicked back into Darkshade with a new group as soon as I was done with the first one.

Not sure if they fixed what you ask for but I never have problems leaving in the end.

Edit: still at work so missed the big crash and all the grouping problems that followed. Seems broken judging from all the threads...