During the weekend I had opportunity to test second router - it was the same. I have written complaint to my provider.
At the moment I had no issues playing Netflix on my Odroid N2, because the resolution is limited to SD, like written on this topic: https://discourse.coreelec.org/t/netflix-only-in-sd-on-odroid-n2/11380 - I’m very disappointed, because that is why I bought the Odroid N2 - to have stutter less FullHD Netflix…