Hello everybody... I am having the same issues like WillianBug since V1.58.
On a uncertain point during the missions (mostly created in the workshop) all the missiondata (waypoints, statistics, team, etc) is missing.
Even loading a previous savegame is not solving the problem. Only when you revert the complete mission, you are able to try it again.
It would be very nice if somebody would have a solution for this.
Cheers