The issue can happen when you click very close to the start of the mission (when server actually already saved unit placement in teams and is currently starting the mission) and unfortunately there seems to be no simple solution for this. It would require a lot of changes in the net communication between host and clients. As far as Project Argo is experimental project at this moment, we are not able do so huge changes directly in the engine. But we will definitely keep it in mind for the future!

Marking as resolved (cannot be fixed). Thanks for the feedback!