Campaigns corrupt?

[Querer]

Hi all,

I have a very strange issue obviously nobody else has: in the campaign (both english and German ones), the planes aligned behind me on the runway do not take off. In the british campaign this is from mission 4 (intercept strange twin engine plane) onwards, in the german campaign already from mission two onwards. To be precise, the two planes in front of me take off, I follow and that's it. If I now turn on autopilot, the three of us make our turns above the homebase, forever waiting for the remaining planes to take off. I I fly on my own and follow the waypoints, I am the only one (with minor success in finishing the mission of course...). Strange enough that the AI planes still on the ground continue to announce "ready for takeoff" but they never do... Like this, the campaigns are basically unplayable very soon, this s****. Any help on this one?
What I already did: I emptied the /cache and the /shaders folder and tried to restart the campaigns, everything without any success, the problem persists...

BTW: after cleaning the folders mentioned above, I suddenly had crashes of the launcher.exe (never had it before...) when starting up the game and also when loading a mission. In addition, after cleaning the folders, the buildings suddenly fade out quiet near and it takes longer to load the textures of any object (including own plane...) And, also important to some of you probably: the stutters are remarkably reduced if you set the building density to unlimited (compared to low ).