For server cmd line arg you should assume spaces are your enemy that aren’t inside quotes btw. Here is a more cleaned up example on yours:
ShooterGameServer.exe /Game/Mods/479062471/GenericMod?listen?ModId=479062471?QueryPort=27016?SessionName=“[Canna Ark Test]”?MultiHome=192.168.0.8?MaxPlayers=50?listen -game -server -log
So in those 2 seconds before a crate spawns do you know if other parts of your mod look to be loaded?
Also I’m guessing you are creating child blueprints of the blueprints you are overriding? And that those assets are located in the mod folder?