I switch back and forth from solo to group play depending on what I'm doing. On occasion I'll forget to switch back to solo before launching a mission. In the past I used to have a few second buffer on when I could cancel joining and actually press the button to do so. Recently that buffer is gone and I'm immediately thrown into a group. When I say gone it's greyed out and I can't cancel. I miss being able to cancel and correct my mistake before landing in a mission and possibly upsetting other players by exiting when I intended to play something solo.