Very sudden drop in team ranking

Is anyone aware of any issues with rankings? Our FA team went from 9 to 24 overnight (top flight crew teams) - and half the sites seem to be missing (from 34 to 17) after holding ranks of 6-8 for much of 2019. I myself have not changed any team members and viewing the team page shows the same members. The majority of the stations are under my userID and they are all active and taking the same level of traffic as the previous day/week before. Also, my own personal rank hasn’t changed - which I assume it would if there was a problem with all my nodes failing to update. Lastly, historically if we lose/gain stations we’d see a gradual movement in the ranking up or down (1-3 points) so I’m at a loss.