WiFi issues following recent fibre install

[HiHeather]

Hi, We recently had sky fibre installed at a new house and I am having a couple of issues which may or may not be related. Any suggestions appreciated!

• Last night my phone said there was suspicious activity on the network and recommended I disconnect. I did, and checked the MySky app for activity. There are a number of devices with a wired connection to our router that I don't recognise - amazon echo and amazon fire stick, three iphones, a Ring device, an xbox, a Samsung TV... It seems like basically a whole house of extra devices. I apparently can't disconnect these in the app without upgrading to WiFi max... so they're still there. There were also a couple of wireless connections I didn't recognise and after I changed the WiFi password I could disconnect them. My partner uses a TP Link extender to connect his PC to the Internet and I wondered if this showed up weirdly, but there is a TPLink extender showing in the list and I don't think it would spawn loads of other devices?
• This morning my work laptop and my partner's work laptop are both having issues connecting. My partner can't connect to his work's proxy server, when he could yesterday, and for me websites sometimes fail to load initially with a DNS error and then (mostly) work if I reload them a couple times, although certain site elements may fail to load. When I run an Ookla speed test it downloads at c. 500mbps (correct) but fails to upload (might be a work firewall); Google speed test fails to load in the google page; MySky says it "can't test my broadband right now" (same for wifi).
• Nothing showing as problematic on the openreach box, sky hub light is solid white.

Any ideas?

[Tom-W19]

Hi @HiHeather 

Your post has been escalated to our Community Messaging team who will invite you to a private chat shortly and help you with this.

Just look out for the chat bubble to start the conversation.

Here's more information on how Community Messaging works - https://community.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147

[HiHeather]

Thanks however this morning it seems to have resolved itself...

Reliable 500+ down/65 up across devices, work laptops no longer failing to load websites. It might just have been connection instability given the first few days of activation?

The unknown wired connections on the network disconnected over yesterday and I was able to remove them on the app once that happened. Still strange that they were on there though.

[TimmyBGood]

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@HiHeather wrote:

 My partner uses a TP Link extender to connect his PC to the Internet and I wondered if this showed up weirdly, but there is a TPLink extender showing in the list and I don't think it would spawn loads of other devices?

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Is that a Powerline adapter (ethernet over mains electricity cable) ?

There's a rare but known phenomenon where these can inadvertently merge a connection with a neighbouring property that has the same adapters.

[HiHeather]

Yep it is. That was my first thought honestly, that it could be basically all next door's devices (although I haven't seen a ring doorbell anywhere it might be inside/round the back) but should I be worried that the tp link is able to communicate on our neighbours' circuit (for things like electricity billing etc)? And things like amazon echo, the phones etc are wireless rather than wired connections, I would have thought, so how come they get put on our network if they are already connected to the neighbour's?