OpenWRT - ipv6 relay mode - ipv6 nextdns resolver not used

Hello NextDNS team - I have opened this thread in community forum as well. But I think there is a bug or some sort - when ipv6 relay mode is used in openwrt - nextdns is not used for dns resolution.

https://help.nextdns.io/t/q6hpvg8/openwrt-ipv6-relay-mode-nextdns-resolver-not-working

Any suggestions on how to get this fixed?

Thanks