New laptop = new wifi issues

Hey guys,

Wondering if anybody has any ideas on diagnosing/fixing this problem.

Just acquired a new laptop, Asus Zephyrus M, Windows 10 (https://www.pbtech.co.nz/product/NBKASU501001/ASUS-ROG-GM501GS-EI001T-GTX1070-Premium-Gaming-Lap). Adapter is an Intel Wireless AC 9560.

Having some issues connecting it to the wifi which is an Tp-link AC750 (https://www.tp-link.com/au/products/details/cat-9_Archer-C2.html). Firmware on the router, and drivers/Win 10 on the laptop are up to date.

When logging onto the 5ghz network, my laptop fails a variable number of times before eventually managing to log on - can take up to 4 attempts before success. Sometimes, the connection gets dropped randomly. This is not a problem i've had with any other laptop at home, or my Apple mobile devices which all log on smoothly. My flatmate's surface pro also connects smoothly. In addition, there are no problems at all logging onto the 2.4ghz network from the same router (completely different SSID though) which functions smoothly. Unfortunately, i've only had the laptop for a short time so i've not been able to log onto another router than my mums (which only runs a 2.4ghz network - works fine and smoothly)

I've tried

a) On the router, changing the 5ghz channel and channel width from auto to pre-selected channel and narrower widhts

b) Copying the settings from the 2.4ghz network to the 5ghz network

c) Changing channel width on the laptop

d) Assigning a manual IP on the router for this device

e) "Forgetting" the network, and relogging.

Also had a thorough browse on the internet about this....can't find any suggestions that I haven't already tried.

Just seeing if any clever person has any bright ideas?