Ar-300M; Tor 264; IPv6 leak

Today i tried the TOR Image 2.64 on an AR-300M behind a Fritzbox. For IPv4 i am anonymized, IPV6 lists my IP6 adress. I have to stop the IPV6 Interface.

Can somebody verify this? It is a Security Risk.
With putting the slider to Tor, it should deativate this interface automatically, when IPV6 doesn‘t work.

Firewall-Zone for wan6 is unspezified.

According to some customers feedback, the IPv6 doesn’t work well on the router. We don’t maintain tor firmware any more, however, you can disable IPv6 protocol manually.