In the ifconfig output in your first screenshot only igb0 and igb2 are active members of the lagg0 pseudo-interface. Are igb1 and igb3 up and connected to the correct ports on the switch? If multiple switches are involved do they support multi-chassis LACP between each other?
I reported DC to check Switch config and looks like things are good now, traffic is distributed to all ports now.Can you switch the cables between one of the working interfaces and one of the other two? If the active state moves with the cable it is most likely a problem with your switch configuration.