[stimpsky]

Well I said that

I had two RT-AC66U in bridge mode in my previous house connecting the TV and equipment to the BT modem which I had...

So if you quote me out of context it seems awkward agreed. Almost like fake news

Originally Posted by Kushan

I have no idea what you've done, I've re-read your posts numerous times and your network setup is not completely clear. It's contradictory at best.

Sorry for not being clear (English is not my mother tongue), but I have never used the SH3 in a bridge configuration. This is/was my setup:

(Until one month ago (this was just used as an example in a previous post): BT [modem] -> 2x RT-AC66U [bridge mode] -> TV; worked OK)
For one month and until yesterday: SH3 [router mode, WiFi off] -> TP-Link 1200 -> rest of house; worked OK, then broke like OP described
As a workaround since then: SH3 [modem mode] -> RT-AC66U [router mode, WiFi off] -> TP-Link 1200 -> rest of house; works OK but suboptimal setup imho