I am using nginx with multiples https with a single IPv4 and dedicated IPv6 for each domain.

The problem i'm having is i'm unable to redirect non www to www without conflicting with the vhosts.

Here my setup

[b]Default[/b]

[code]
server {
listen 80 default_server;
listen [::2]:80 default_server;
server_name localhost;
}
[/code]

[b]domain[/b]

[code]
server {
listen 80;
listen [::2]:80;
server_name domain.com www.domain.com;
return 301 https://www.domain.com$request_uri;
}

server {
listen 443 ssl http2;
listen [::2]:443 ssl http2;
server_name domain.com;
return 301 https://www.$server_name$request_uri;
}

server {
listen 443 default_server ssl http2;
listen [::2]:443 default_server ssl http2;
server_name www.domain.com;
}
[/code]

[b]domain 2[/b]

[code]
server {
listen 80;
listen [::3]:80;
server_name domain2.com www.domain2.com;
return 301 https://www.domain2.com$request_uri;
}

server {
listen 443 ssl http2;
listen [::3]:443 ssl http2;
server_name domain2.com;
return 301 https://www.$server_name$request_uri;
}

server {
listen 443 ssl http2;
listen [::3]:443 default_server ssl http2;
server_name www.domain2.com;
}
[/code]

So here's the problem

IPv4

https://www.domain.com ✔
https://domain.com ✔

http://www.domain.com ✔
http://domain.com ✔

https://www.domain2.com ✔
https://domain2.com ✗(NET::ERR_CERT_COMMON_NAME_INVALID - domain.com)

http://www.domain2.com ✔
http://domain2.com ✔

IPv6

https://www.domain.com ✔
https://domain.com ✔

http://www.domain.com ✔
http://domain.com ✔

https://www.domain2.com ✔
https://domain2.com ✔

http://www.domain2.com ✔
http://domain2.com ✔

In IPv4 domain (https://domain2.com) the certificate of domain.com is served.

What's wrong with my config? If work on IPv6 why not in IPv4 is in same config block?