[alibert]

Same network for both: fixed ethernet on my desktop computer and wifi for the phone.

I tried LTE only and I also get the red MITM page.

Edit: tried my laptop on wifi, green OK

[cmg]

Interesting. I tried on my home WiFi (Comcast) on my Mac - green page (no MITM).

On my iPhone, (AT&T LTE) - red MITM page.

iPhone on my WiFi - red MITM page even with the cellular antenna disabled(!)

Tethered my laptop to my phone - red MITM page.