RT-AC86U / DDNS IPv6 not working / 3.0.0.4.386_51255

[relgames]

I have native IPv6 address and am trying to use DDNS with domains.google

This is how it looks in UI:

But the domain only gets ipv4 address. I checked /etc/inadyn.conf and it doesn't mention ipv6.
I tried to make a copy of the file and added "allow-ipv6 = true" into it, and then tried with

inadyn --once -f "/jffs/configs/inadyn.conf"

And I could see it updating ipv6 address:

Mar 23 21:53:16 inadyn[13455]: In-a-dyn version 2.8.1 -- Dynamic DNS update client.
Mar 23 21:53:16 inadyn[13455]: IPv6 address fe80::[censored] is not a valid Internet address.
Mar 23 21:53:16 inadyn[13455]: Update needed for alias [censored], new IP# 2a02:[censored]:3e93
Mar 23 21:53:18 inadyn[13455]: Updating cache for [censored]

So looks like IPv6 Update = Yes has no effect on /etc/inadyn.conf - is this stock firmware bug? Should I report it via the feedback form?
And as I'm on the stock firmware, I guess I have no way to add allow-ipv6 = true to /etc/inadyn.conf automatically?

 

[mlai]

I don't think Asus implemented IPv6 DDNS unless you are using asuscomm.com. I had to do a CNAME on my domain to redirect to a name I setup with asuscomm.com to get around this issue.