@arrjay my thought is, given how OP's network setup sounds a little bit screwy they might have misfired something that's intended to differentiate 'households' behind a cg-nat setup or something like that. but these things are always intentionally a little bit opaque
@rudi @arrjay it's okay with four discrete Wi-Fi APs, correctly NAT'ed, which we have now that we have fibre, but we used to have four routers, each connected to its own 4G modem, and I bet that would have set off whatever OP triggered.
I can only speak to Netflix France, but it sounds like OP and I have similarly inconvenient-to-network rural architecture.