rsyslogd does not write data to logfile when configured with TLS - rsyslog

Question

I'm trying to set up rsyslog with TLS to forward specific records from /var/log/auth.log from host A to a remote server B.
The configuration file I wrote for rsyslog is the following:
$DefaultNetstreamDriverCAFile /etc/licensing/certificates/ca.pem
$DefaultNetstreamDriverCertFile /etc/licensing/certificates/client-cert.pem
$DefaultNetstreamDriverKeyFile /etc/licensing/certificates/client-key.pem
$InputFilePollInterval 10
#Read from the auth.log file and assign the tag "ssl-auth" for its messages
input
(type="imfile"
File="/var/log/auth.log"
reopenOnTruncate="on"
deleteStateOnFileDelete="on"
Tag="ssl-auth")
$template auth_log, " %msg% "
# Send ssl traffic to server on port 514
if ($syslogtag == 'ssl-auth') then{action
(type="omfwd"
protocol="tcp"
target="<ip#server>"
port="514"
template="auth_log"
StreamDriver="gtls"
StreamDriverMode="1"
StreamDriverAuthMode="x509/name"
)}
Using this configuration, when I try to ssh-login the first time into the host A from another host X everything works fine; the file /var/log/auth.log is written and the tcpdump shows traffic towards server B.
But from then on, it does not work anymore.
Even if I try to exit from host A and login back again whenever I do, the file /var/log/auth.log is not ever written and no traffic appears over tcpdump.
The very strange things is that if I remove the TLS from the configuration it works.