Server hangs when connecting manually to outbound

[brianmay]

If I connect manually to outbound connection it does the correct thing:

#nc -v localhost 8084
Connection to localhost (::1) 8084 port [tcp/websnp] succeeded!
connect

^C

Then on my next connection attempt, the server hangs and fails to respond:

nc -v localhost 8084
Connection to localhost (::1) 8084 port [tcp/*] succeeded!
^C

I haven't yet had a chance to debug this in more detail.