Open Vpn IPv6 issues

[nevolex]

Hi everyone

I am new new pfsense, so maybe doing something wrong,
I have configured a open vpn server in pfsense

mode is "tun"
protocol udp ipv4/ipv6 on all interfaces multihome

tunnel network is set with ipv4/ipv6 default private ips

I am forcing all client-generated IPv4 / IPv6 traffic through the tunnel.

Gateway creation - both

rules are automatically created and the client gets both private ips (4 and 6) (tested from the mobile network that only support ipv4 )

however when checked on the internet from the client side I could only see Ipv4 public ip address

when the gateways are created - ipv6 open vpn interface is showing down

my wan gateways are up for

public ip4
public ipv6
openvpn ipv4

please advise what can be a problem?

thanks a lot