IPv6 Port Forwarding (torrent) OPNsense

[OPN-UserGuide 2]

Hey, I'm currenlty updating my guide to include IPv6.

It looks like the port is open and forwarded correctly as indicated by the AirVPN test in the port section. Other public port tests also indicate that the port is open.
The torrent client sees IPv6 clients and can connect to them but barely downloads anything. After 4 times trying and getting like 400k each time, the client switheches to IPv4 and the transfer starts fine.

I wonder if there is an issue on my end or the other parties have all misconfigured their systems ? I was able to connect to one ot two IPv6 seeder fine but like 99.99% it fails.

Any advise ? ICMP might be a thing but I have no clue on what to allow due to the multi NAT here.

AirVPN public IPv6 => AirVPN private IPv6 => My Private IPv6 => Client.
 

[OPN-UserGuide 2]

No idea of anyone ?

[flat4 79]

Nope, I don't use ipv6