Very strange issue with AX4200 Tri Band Orbi

Hi everyone.

First time poster and I have an issue that is frankly weird (well i think it is anyway).

My Orbi AX4200 (1 satelite) is working very well for my PC, gaming consoles etc. The issue I am having is with my Samsung Galaxy A8 tablet. For some reason, when my tablet is picking up the router wifi i continuously get the  "Connected without internet" issue and cannot get online, although very occasionally it will connect for say 30 seconds before dropping out.

The second i walk to the other end of the house and the tablet switches over to the satelite it is 100% completely fine, works at full capacity and with no drop outs.

I have tried everything including unplugging both the orbi and the router, forgetting the network on the tablet... I even did a few suggested things such as turning on wifi throttling (or something) and messing with the DNS settings. Im out of ideas.

Any help is appreciated.

Thanks