Dedicated Server not binding to ipv6

[Yes]

It says it's binding to [::]:7777 when starting the server, but it doesn't, it only binds to udp6 7778, but no tcp6, so can't connect.

Ipv4 works fine. (Previous version of the DS worked fine on ipv6)

[ 0]LogServer: Warning: Failed to bind Socket 'FGServerAPISocket' To Address '127.0.0.1:7777': SE_EADDRINUSE
[ 0]LogHttpListener: Warning: HttpListener unable to set desired buffer size (524288): Limited to 425984
[ 0]LogHttpListener: Created new HttpListener on 127.0.0.1:7777
[ 0]LogServer: Display: Server API listening on '0.0.0.0:7777' (Standalone)
[ 0]LogServer: Display: Server API listening on '[::]:7777' (Standalone)

tcp 0 0 0.0.0.0:7777 0.0.0.0:* LISTEN 13528/FactoryServer
tcp 0 0 x.x.x.x:48070 x.x.x.x:443 ESTABLISHED 13528/FactoryServer
tcp 0 0 x.x.x.x:34352 x.x.x.x:443 ESTABLISHED 13528/FactoryServer
tcp6 0 0 :::44307 :::* LISTEN 13528/FactoryServer
udp 0 0 0.0.0.0:7777 0.0.0.0:* 13528/FactoryServer
udp6 0 0 :::7778 :::* 13528/FactoryServer