@dlfranks Thank you for this suggestion. I checked my IPv6 setting and it is already turned off. I'll turn it on/off and reboot to see if this has any effect. BTW, I've also tried different DNS...

I recently updated the firmware on my Deco XE75 (AXE5400). The package I purchased included three units and I've had no issues up until now. Before the upgrade, the firmware version I was running was...