Ipv6 router, I cannot manage to get router messages through

Hello all.

I am trying to build a small wifi-access point with ipv6-only.
This require a router part and I cannot get it to let router messages 
through, no idea why.
I have another router that does ipv6 perfectly, but in dual stack.

Here is my pf.conf :

lan="bse0"
wifi="bwfm0"
set skip on lo
block return log	# block stateless traffic pass			
# establish keep-state
antispoof      for {($wifi) lo0 }
pass	inet6 	proto icmp6 all	icmp6-type { unreach, timex, paramprob, echoreq, echorep, toobig } allow-opts

# neighbor discovery and routeradv/sol should be listened by the router, but won't go further

pass	inet6	proto icmp6 from $wifi:network 	to { ff02::/8, (self)} icmp6-type { neighbradv, neighbrsol, routeradv, routersol,groupqry,grouprep,groupterm }
pass    inet6   proto icmp6 from $wifi:network	to { ff02::/8, (self)} icmp6-type { 141, 142, 143, 148, 149, 151, 152, 153 }
match in  on $wifi 	scrub (no-df random-id max-mss 1440)```

Here is my sysctl.conf:

net.inet6.ip6.forwarding=1
net.inet6.ip6.mforwarding=1
net.inet6.ip6.multipath=1
net.inet6.ip6.multicast_mtudisc=1
net.inet.ip.arpq.maxlen=250
net.inet.ipcomp.enable=1
net.inet.tcp.mssdflt=1440

I believe this has nothing to do with pf or sysctl though because here 
is what I get:

|Jun 12 17:07:17.428687 rule def/(ip-option) block in on bwfm0: :: > 
ff02::16: HBH multicast listener report v2, 3 group record(s) [hlim 1]|

So, what is it I am missing ?

Thank you.