İpv6 not working

[Murat Y]

Hello. modem is in bridge mode and then there is the Asus rt ax86u. It receives ipv6 as seen in the image I sent, but I can't pass the ipv6 test. and interestingly every few minutes the connection seems to be lost on the interface and even the internet light on the router is red. But I guess the connection is not breaking. Maybe the problem is software. But it was just updated 10 days ago. Where am I doing wrong?

 

[Murat Y]

''ipv6.google.com'' It's pinging. but it fails the ipv6 test.

 

[Murat Y]

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