I stopped using DHCP to configure my powerline adapters, and the issue went away. Looks like if DHCP client is enabled, it also allows them to act as a DHCP server under certain conditions, which...

I see both the 8630 kit and PA9020P kit available in the UK - https://www.tp-link.com/uk/home-networking/powerline/?filterby=5798%7C5799

Do you know if the ports on the TL-PA9020P are recognised as gigabit ports by devices connected to it? I have a TL-WPA8630P and despite it being advertised as Gigabit, devices only work as 100baseTX...

@PedroTMelo I did notice that the German version of the site has links to buy individual TL-WPA8630P devices at Mercateo, and in the UK to Amazon. However, Amazon (and it's resellers) don't have any...

@PedroTMelo I'm not sure it is TP-Link's fault. They offer the devices, but I haven't found a retailer that carries them. Have you tried asking TP-Link which retailers in Portugal carry the devices...

@PedroTMelo maybe if you said what country you were in someone could help you? For what it is worth, I am in the UK, and I don't see the single devices available for sale anywhere. I ended up buying...