ARP table changes - ORBI RBR40 and three sattelites

Try this, factory reset the RBR and RBS. I would disconnect all other devices from the RBR and RBS. Setup the RBR first using 1 wired PC. I would disable Daisy Chain first. Then sync the RBS to the RBR one at a time. Setup a IP address reservation ON the RBR for each of the RBS. Once they are connected and setup with the RBR. Turn them OFF and place back in there remote locations. I would connect the rest of your devices and network back to the RBR. Then turn on the RBS one at a time. Then let things settle in. Check the logs. Or turn on the RBS first, then connect the rest of your devices and networking to the RBR. Check logs.