Mild spoilers ahead, but you're reading the solutions thread.
I was just doing some preliminary checking of the data on my phone with Nushell (to see how much my ageing laptop would suffer) when I discovered there weren't any non trivial cases.
Normally I get the test data working before trying the input data, this is definitely teaching me the value of investigating the data before heading down into the code mines.
Unfortunately I can't get the second star yet because I missed a few days.
Personally, my local Cloudflare seems to have some problem with IPv6 and some sites won't load. On my desktop I've set Firefox to use IPv4 for such sites, but on my phone I need to use mobile data (which doesn't support IPv6). I don't think it's a common problem, but you did ask.