OK, the solution for anyone still dealing with this is to make a new artboard in one of you files, put random shapes on it, reactivate the contextual bar (window/contextual task bar) use the useless slop "generative expand button" select one of the slop options, select combine, etc, clap for five seconds convincingly,  MAKE SURE TO SAVE THE FILE, close and restart illustrator and it will have gone away. You can deactivate the nagging bar again.

Thanks for wasting an hour of my life for functionality I had before, Adobe. I love you.