When playing in multiplayer (Have yet to try it in single player): If you mash 'E' when a barrel first hits the net as a host you obtain an obscene amount of materials and as a connected player it's nearly infinite.
Hey! We are not the creators of multiplayer and we can't help you with that bug. If you message the creator of the multiplayer extension I'm sure that he will help you.
hello by any chance what device are you playing on???