IPv6 default route lost / ICMP6 RA not received

[loredo]

After rebooting the device, the issue is back.
What I noticed is that the connection would be stable as long as a client would ping to the internet. As I was stopping the ping from that client, die v6 default route on the FW would immediately disappear.
I deleted all VIPs on all interfaces and rebooted the device. Shortly after I am still facing the same issue...

I can see that igb0 still has the public IP assigned but the default route is missing.

Looking into the DHCP log "Services > DHCPv4 > Log file" and filter for "dhcp6c" shows that RENEW replies are being received and the address added to the interface. However, I don't think it is an DHCP issue because the interface does have it's public IP but the routing table does not have that default route set.

[loredo]

Can somebody help to guide me how to debug this any further, please?

[loredo]

Just wanted to let you know, after upgrading to 19.1.1 everything seems to work. Keep your fingers crossed! :-D