Good evening

Yesterday I bought an Archer C6 wifi router,

I installed it and it all worked seemingly well (access point mode) , the bandwidth was good, all the LEDs were solid green, but sometimes, randomly the ethernet connection to my computer will drop, the "Internet on" LED will go orange for a few seconds then everything will go back to normal and the LED to green.
This happens at seemingly random times, from 5 minutes apart to one full hour appart.
It is extremely annoying since i play online video games a lot.

I have tried swapping ethernet cables, updating the firmware and swapping the port the router is connected to on my modem.
The problem cannot be coming from my home main modem since when it was plugged directly into my computer there was never any drops or issur of the sort.

Thank you for reading and your answers