I am having an issue with the Archer AX11000 and connecting when WMM is disabled

i upgraded my router about 3 weeks ago to an archer ax11000

then upgraded my pcie card to the AX3000 a couple weeks later.

i get amazing download and upload speeds considering my location to the router, connected on 2.4g

but gaming is terrible.

but when i connect to the ISP Wifi, crappy downloads but a pretty stable gaming experience.

as soon as i disable WMM on the AX11000, my PC nor my phone will connect to it.

PC continually asks for password and the phone says Authentication error.

i then have to hard reboot the router to gain access to it, to reset all the settings.

i have tested this like 7/8 times in different modes..

i need to know if this is a fault or im doing something wrong.

i feel its a fault.