Think I have found the issue. Looks like the main deco is having hardware problems. I have replaced the main deco for one of the spokes and network is much more stable. The previous main deco is...

@David-TP any ideas?

@David-TP sorry here are photos. When the master drops off all decos go to a solid red light to indicate no internet.

Hi, Could really do with some help: Setup: I have 4 deco p9s over a 3 story house. They are connected in ap mode as the p9 doesn't support the fiber connection. I'm using a Vodafone router thg3000....