IPv6 issues help please

[elkido122]

so I have a Rt-ac87r with Comcast Isp. On test-IPv6.com from my main wired computer with Windows 10 it says 1/10 for score and tells me there's a problem with mtu and IPv6. On IPv6-test.com I get 19/20. Any reason this is happening I know I'm connecting through IPv6 to YouTube and such . Any help appreciated

 

[Deleted member 22229]

There is something wrong with that site for the last few days. It also shows the same for me and many others have reported this in other forums. Just use another IPv6 test site till they figure out the issue.

 

[kvic]

test ip6 dot com is fine for me. Just tried on my phone through openvpn server at home. I got 10/10.

Sorry, I have no experience with win 10 nor any recent win releases.