I have my server not configured to be persistent. So the mission unloads after the last player disconnects. Every time after the "Starting game..." is done, a couple seconds later I get kicked for "BattlEye: Clinent not responding". It's the first time I've ever encountered that. It's also not just me. When my friends connect (as the first player) they also the kicked.
I tried other missions (not antistasi missions) and all is fine with them. Only this one.

Any Idea?

When the server is persistent the and the mission continues... the second connect to the server is all OK and we can play. This only happens after "Starting game..." to the first player