Windows Client IPv6 connection issue

Summary

Reproducibility	Platform	OS	OS Version	Product Version
always	AMD64	Windows Server	2016/2019/2022	11.0.6, 13.0.1

Description

Windows Client does not correctly accept IPv6 connections.

Debug shows:

server05a-fd: lib/watchdog.c:82-0 Initialising NicB-hacked watchdog thread
server05a-fd: lib/watchdog.c:197-0 Registered watchdog 311c2c8, interval 30
server05a-fd: lib/mem_pool.c:617-0 max_size=512
server05a-fd: lib/events.c:48-0 Events: code=FD0001 daemon=server05a-fd ref=0x238e type=daemon source=*Daemon* text=Filed startup
server05a-fd: lib/message.c:1534-0 Enter Jmsg type=17
server05a-fd: lib/watchdog.c:254-0 NicB-reworked watchdog thread entered
server05a-fd: filed/filed.c:295-0 filed: listening on port 9102
server05a-fd: lib/bnet_server.c:90-0 Addresses 0.0.0.0:9102 [0.0.0.0]:9102 

(Startup successful, now I’m running stat client command on server)

server05a-fd: lib/bnet.c:490-0 Socket error: err=10014 Unknown error
server05a-fd: lib/bnet_server.c:191-0 Accept=-1 errno=603979776
server05a-fd: lib/bnet.c:490-0 Socket error: err=10014 Unknown error
server05a-fd: lib/bnet_server.c:191-0 Accept=-1 errno=603979776
server05a-fd: lib/bnet.c:490-0 Socket error: err=10014 Unknown error
server05a-fd: lib/bnet_server.c:191-0 Accept=-1 errno=603979776

(last two lines repeat until client is terminated)

Please note, debug shows server05a-fd: lib/bnet_server.c:90-0 Addresses 0.0.0.0:9102 [0.0.0.0]:9102 even client listens on IPv6 address. On Linux this line contains "Addresses [::]:9102", which seams correct.

I've tested Windows Server 2016, 2019, and 2022, using 11.0.6. and 13.0.1 binaries from bacula.org web site. Server is Ubuntu Jammy running Bacula-dir and -sd, version 11.0.6.

Steps to Reproduce

1. Set up IPv6 on Client and Server
2. Have Director connect to Client using IPv6
3. Issue stat client on Director

Additional Information

config files:

# cat /opt/bacula/etc/bacula-fd.conf
FileDaemon {
  Name = server05a-fd
  FDAddresses = {
    ipv6 = { addr = ::; port = 9102; }
  }                # where we listen for the director
  WorkingDirectory = "C:\\Program Files\\Bacula\\working"
  Pid Directory = "C:\\Program Files\\Bacula\\working"
  Plugin Directory = "C:\\Program Files\\Bacula\\plugins"
  Maximum Concurrent Jobs = 10
  Heartbeat Interval = 300
}