OSPFv3 - Routes are in database but don't propagate to routing table

[NiQ1]

Hello everyone, I have this weird issue that despite my best efforts I've been unable to solve and I'm completely puzzled. I'll first mention that it's still on Quagga because it's on OpenWRT from 2019 and updating to FRRouting would be impossible without upgrading the entire firmware, which is not possible on the current hardware. I just hope there aren't too many changes to ospf6d in the last few years.

I'm trying to configure Quagga to use OSPFv3 to create proper IPv6 routes between two OpenWrt routers running OpenVPN (tun mode). I know the tunnel is working properly because it works if I configure the routes manually.

Both routers have a link-local address on the tun0 interface, and I can actually see OSPFv3 packets between the routers, but the routes are not being set-up in the routing table. I would also like to point out that OSPFv2 does work so this is probably not a permission issue.

It seems that the routes are actually in the database (I can see them when I run the "sh ipv6 ospf6 data" command but they don't appear when I use the "sh ipv6 ospf6 route" command or the OS routing table.

I'm attaching the ospf6d.conf files from both routers, I'd appreciate any insights regarding possible misconfiguration.

OpenVPN server side:

hostname gateway1
password *********
enable password *********
log file /tmp/zebra-ospf6d.log

!
!
!
interface default
  ipv6 ospf6 passive
!
interface br-lan
  ipv6 ospf6 passive
!
interface eth0
  ipv6 ospf6 passive
!
interface eth0.1
  ipv6 ospf6 passive
!
interface lo
  ipv6 ospf6 passive
!
interface pppoe-wan
  ipv6 ospf6 passive
!
interface tun0
  no ipv6 ospf6 passive
!
interface wlan0
  ipv6 ospf6 passive
!
interface tun1
  ipv6 ospf6 passive
!
interface tun2
  ipv6 ospf6 passive
!

router ospf6
  router-id 192.168.92.2
  redistribute kernel
  interface br-lan area 0.0.0.0
  interface tun0 area 0.0.0.0
  interface tun1 area 0.0.0.0
  interface tun2 area 0.0.0.0
  area 0.0.0.0 range 2000::/3
  area 0.0.0.0 range fc00::/7
!
line vty
!
end

OpenVPN client side:

hostname gateway
password *********
enable password *********
log file /tmp/zebra-ospf6d.log


!
!
!
interface default
  ipv6 ospf6 passive
!
interface br-lan
  ipv6 ospf6 passive
!
interface eth0
  ipv6 ospf6 passive
!
interface eth0.1
  ipv6 ospf6 passive
!
interface lo
  ipv6 ospf6 passive
!
interface pppoe-wan
  ipv6 ospf6 passive
!
interface tun0
  no ipv6 ospf6 passive
!
interface tun1
  ipv6 ospf6 passive
!
interface wlan0
  ipv6 ospf6 passive
!
interface wlan1
  ipv6 ospf6 passive
!

router ospf6
  router-id 192.168.92.1
  redistribute kernel
  interface br-lan area 0.0.0.0
  interface tun0 area 0.0.0.0
  interface tun1 area 0.0.0.0
  area 0.0.0.0 range 2000::/3
  area 0.0.0.0 range fc00::/7
!
line vty
!
end

Any help would be greatly appreciated!