Deco M9+: Speed drops to 90Mbps from 350Mbps after a few hours. Restart and it returns to 350Mbps.
I have an M9+ V2 as the main node connected to a Virgin Media modem. The main M9+ node is then connected to a further 5 deco nodes (2 x M9+ and 3 x M5) through a Netgear unmanaged switch. All connections between components is wired Ethernet.
When I start the M9+ main node, I get 350Mbps download speed. Within a a few hours, it will drop to 80 or 90 Mbps. If I turn off /on the M9+ main node, the speed with return to 350Mbps for another few hours, before once again dropping to 80 or 90Mbps.
Any ideas what could be happening? I am using the Deco app and all M5 and M9+ nodes are running the latest firmware.
Thanks for any ideas.