I have now encountered a new issue with my Archer C6 Eu version. A couple of months back while configuring the Router for Guest Network, it suddenly crashed and then it just showed 1 x WiFi network....

@Sarcaustic Thanks! Setting 2.5GHz Band it to Channel 1 resolved a bit of the issue, but the issue still occurs occasionally. Over last 12 hours it happened twice after being stable for over a week....

So will 2.4 GHz Band set to Channel 1, things appear much stable. Thanks to the gentlemen who suggested this as per Malaysia Tech Support. However the Router has other bugs too. I already highlighted...

@DaryllD I now set the channel width to auto as Channel 1 with 40 MHz setting still crashed after 3 days.

@Lahiri A small correction - seems like Channel 1 on 2.4 GHz band is working fine with 40 MHz bandwidth. But the QoS setting is faulty and things are stable (fingers crossed) for the past 3-4 days.

Tried Channel 1 with 40 MHz Bandwidth and the 2.4 GHz. The problem persists. I can also confirm that there is also an issue with QoS on 5 GHz band. When QoS is enabled, my HP notebook suddenly looses...