A silly question perhaps.
But, if you connect an allstar node configured as half duplex to a repeater (capable of full duplex), it seems that node is quite capable of running in full duplex mode. In fact, if you link it to another allstar node that is configured as full duplex, then the node essentially runs full duplex. Is there a way to force a node to run half-duplex no matter what it is connected to? Is the only way to guarantee half-duplex operation to replace the repeater with a simplex radio? (that way the receiver will be dead while transmitting).
My point is that you have configured the node as half-duplex but that does not mean it is going to run as half duplex.