Following instructions are provided without any warranty, and may even get you in trouble legally. The instructions are provided for testing, learning, preventing e-waste, and should be use with care. We (including contributers + commentators) are not responsible for any damage to your device(s) or any legal issues.
Instructions have been moved to https://github.com/francoism90/asus-router. :)
I'm using the ax-86u pro and have this same issue using 149 and above causes specifically Intel WiFi cards to use wifi 4 when connected to the 5ghz network
Mediatek WiFi cards work fine so not sure if this is a bug or intentional design from Intel. Would be quite stupid if it's intentional