Getting ipv6 on LXD working at AWS


I have been trying to get ipv6 on LXD working at AWS.
But no success till now.

First I followed this document;

As I did not get it working I went to a more specific document about AWS, but in this case with Docker

That worked.

But still not able to get it to work with LXD. The best I get is a working but very unstable connection.
Not sure what Docker does differently.

Before when getting ipv4 working on LXD at AWS, I had a similar unstable situation (but far less unstable). Which eventually I fixed with ebtables.

For ipv6 I would expect NDP to solve my issue, but don’t see any positive effect.

Anyone experience in getting this to work?

Kind regards,