Why have i had to restore every single internet connected item in my house?

[Mr Moofo]

Ok, computer people, humour me, as I need to know.

My ISP is Virgin - we have been having flaky service for a few weeks which finally delivered a 3 day outage over the weekend. Not knowing that it was Virgin supplying a completely unstable net work, I initailly thought it was my TP Link Deco system.

With the mesh system you set up one nodule as the 'MAIN" - that then feeds the restof them (another 3). In my frustration I factory reset the main Deco, thinking it was at fault. When the Virgin supply internet returned , everything started working again. The main deco was re-set up with the same wifi network name and password. I was thinking this would mean that all items in the house would just hook up and start working again.

Not a chance - every single internet linked item - other than PCs and phones have had to have both the wifi network and password revalidated.

Why?

(The good thing is is I held back on buying a new mesh system - that nearly happened on Saturday)

[KungFooBob]

Was the wireless resetup with the same encryption standards, WPA2, WPA3, etc...

[Mr Moofo]

Yes - afaik

[Le_Fromage_Grande]

Did you manually create the PSK for the Wifi or was it automatically generated?
Has the MAC address of the router changed?
If everything is working, stop thinking about it and get on with life.