cannot reconnect

[superuser5]

Hello,
I started the server
Python 2.7.6 and latest version of the pyrevtun from github.

python pyrevtun.py -m listener -l 0.0.0.0:443 -t 2222 -s example_cert.pem -k example_key.pem -p pass

[] Listening on TCP 443
[] Connection from 1.1.1.1
[] Establishing association between client and listener
[] Tunnel is now associated on listener side
[] Tunnel socket is accessible at localhost:2222
[] Connecting to target host through tunnel
[*] Connected

started target:
:~/pyrevtun $ python pyrevtun.py -m client -l server:443 -c 127.0.0.1:22 -p pass
[] Connecting to listening host at server:443
[] Establishing association between client and listener
[] Tunnel is now associated on client side
[] Connecting to tunneled client service at 127.0.0.1:22
[*] Connected

and i cannot connect to the target only once, is something i do wrong?

$ nc server 2222
SSH-2.0-OpenSSH_7.4p1 Debian

and cannot connect to the target 2nd time.
➤ nc server 2222

am i doing something wrong that i cannot reconnect and have multiple users that can connect to the target?