As another workaround, you can also setup another router in bridge mode broadcasting the same SSID with same password so you don't have to reconfigure your devices. On your Asus router, you'd turn...

This is a problem with many (but not all) TP-Link Kasa devices on the latest Asus firmware as well as with the latest Merlin firmware (which uses the Asus wireless code as-is). You can work around...