I am trying to use a coordinator XBEE3 to remotely configure router XBEE3s that are in our products. To do this I put the coordinator into API mode then send command packets to set up the router XBEEs baud, pan ID, destination address, etc. Afterwards the coordinator is put back into AT mode so it can communicate during the test. I got this working well on one unit (router XBEE), but when I try to repeat it on another router XBEE the coordinator will not connect to it. I duplicated this using XCTU. With the coordinator set to API and the router set to AT the router will show up when I scan the network. Now if I disconnect power to that router XBEE and connect another one the coordinator will not find it on a new scan. I can cycle power on both, even reboot my PC and it will never show up. It seems that once the coordinator has connected to one router it will not connect to any others afterwards no matter how they are set up.