The problem is 5G band won't run on 80Mhz channel width even I set that manually, unless I set the channel manually. Isn't this a bug?

Whenever I set channel to auto, the channel width will become 40Mhz.

It seems the router can only run 5Ghz band with 80Mhz channel width only if I manually choose the channel.

What I changed is the Wi-Fi router. I used same devices to test.

Hi, I checked with some Wi-Fi monitor apps on my Android phone. It showed both 5G channels width were only 40Mhz. Connection speed is only 400Mbps max on all my laptops and phones. They could connect...

Posted a question about SETTING up Archer C4000 yesterday but that post disappeared.... 😅 Is there a way to fix the channel width to 80Mhz for the 2 5Ghz channels? Enable Smart Connect but they...