I've already said this on the Discord (Moony here): I have the problem that the on my server the persistent save does not work. I don't really have experience with this so I'm fairly positive that I have done something wrong. Maybe you have an idea.
To answer some questions:
Yes, Data module is put down in the mission (set to local)
Yes, modules are all set to persistence
Yes, @AliveServer is loaded on the server
You guys know better what to look for...
I'm looking forward to your help.