I didn’t expect you had the same brand router, so I didn’t include the settings. Here are the changes they had me make:
In Wireless > 2.4 GHz:
- Channel bandwidth to 40 MHz
- Control channel to 11
In Wireless > 5 GHz:
- Channel bandwidth to 160 MHz
- Control change to 128
In Wireless > Professional for both bands:
- Roaming Assistant to Disable
In Adaptive QoS > QoS:
- Enable QoS to off (it already was)
Then they told me to power cycle the router and disconnect the ethernet cable from the modem, then reconnect.
That solved the problem with my device repeatedly disconnecting, but it has been a while (~five months), since I went through it.
Since then, there may have been a firmware update, which the support tech told me was coming, and was supposed to address the issue. The notice I saw on Asus’ site has been removed, which may be connected to the firmware update being available. If you haven’t already, I would make sure you’re using the latest router firmware. There’s also a WiFi Disconnect Troubleshooting page at Asus, if you haven’t seen it. Most of it is basic, but there are a few settings they recommend changing that I would not have connected to WiFi issues.