Just tried to do some lineups for tonight's draftkings 8pm turbo contest. I'm getting multiple lineups with no one in the flex position.
One thing I did do when the bug happened was to change the flex to only allow PG, PF or C. It happened when I did that, and again when i changed it back to include all positions.
After I did the post I closed the browser, opened it back up, went back to the site and ran it and I had no problem that time.