Archer A7 individual devices randomly lose internet connection and have to restart router
I have the Archer A7 v5 connected to my EE brightbox modem, which has its wifi disabled and only connection is the Archer A7 router. There is a powerline adapter connected to the Archer A7.
The setup seems okay apart from at random times a device such as my macbook will stay connected to the router but have no internet access. I am able to ping the router but not the EE modem/router (with wifi disabled). The only way to sort this is reset the router's. This also happens with iphones and ipads but can be solved by resetting their network configuration settings.
The firmware is up to date.
Does anyone know the reason for this?