Hi - I have 5 decos around my house. All good. But. They are not connecting to eachother properly. The living room connects to the office which is the furthest away from it!! And the signal is rubbish

I bought a Deco P9 last week. I'm not impressed. I think the firmware is very immature. I feel like I have paid to beta test it. Fundementally I bought it to solve the problem that my smart plugs don'