Enabling Sensei causes IPv6 to stop working

[vijvis]

I am running the latest version of OPNsense 21.1.8_1. My ISP (Aussie Broadband, Australia) provides me with a native IPv6 connection (/128 address and prefix of /56).

Without Sensei, everything works fine. I can get to IPv6 websites and IPV6 tests (ipv6-test.com and test-ipv6.com) pass with 20/20 and 10/10. If I enable Sensei, I can't get to any IPv6 websites and the test scores drop to 4/20 and 0/10.

I have rebooted OPNsense and the issue still remains. I have also refreshed the browser cache just in case.

I have had the same issue with 21.1.7 version so its not a version issue.

Any ideas? Thanks.