Only happens With rog phone 2, my router is asus too. Every 5 to 10 min have a drop of wifi and reconnect.
Already try ip fixed, clear wifi settings
I am facing the same problem bro,there are just too many network glitches in this device and the people at asus are just not taking responsibility for it
Not my router problem so, hope have a fix with Android 10.
This isn't something that happens to most users but we can have a look at your phone to see why 5ghz connection drops in your case.
I can send you a PM with instructions on how to log your phone.