@Eljp Ok, fixed. I have installed a new firmware version, as per instructions and with this updated version, I no longer have the issue. Thank you

@Eljp The ASUS Router is RT-N564U. I have tried to connect using DHCP and the Extender - no change I have tried to connect using Fixed IP outside of the DHCP range and Fixed on the Extender - no...

RE 300 V1.0 Most recent Firmware installed Fully configured with static IP address outside of normal DHCP range. Static IP address registered in Host Router All configuration information matches....