Intersting update. I found the Chromecast's MAC address in the blacklist on my router's security that also shows all the connected devices (yet it still connects to 5 Ghz!). I turned off the...

I have separate 2.4 and 5 Ghz wireless networks setup on my Archer A7 V5. All my smart devices (light bulbs, thermostat, etc) can connect to 2.4 (in many cases they can't connect to a 5 Ghz network)....