Hello mate, the problem that u are having is because of ur server configuration.
U have to add the game.ini from the main server to all other expansion servers. The game.ini file is located in Atlas/ShooterGame/Saved/SERVERNAME/Config/WindowsServer/
More on topic, i've been looking for ages to solve this problem on my server. The only solution there currently is , is a steam mod that is called improved sails.
Lite Version:
https://steamcommunity.com/sharedfiles/filedetails/?id=1628535798&searchtext=
Heavy Version:
https://steamcommunity.com/sharedfiles/filedetails/?id=1629288537