Hi, I recently purchased he Deco P9 system. I first tried to set it up as router mode with my ISP device acting as a modem but I had issues with this as it repeatedly disconnected from the internet. I

A few weeks I bought 3 Deco P9's and set up in router mode, two downstairs and one upstairs. They were all working fine for a few weeks but recently the P9 upstairs disconnects and flashes with a red