The process misses to send all the tags keys to syslog

[jointcloudfoundry]

We are using some metrics customization on the messsages sent to firehose (with tags Keys) . We can see those tags in the firehose (with cf nozzle) , but they are lost on the syslog end point .
Those tags contain ApplicationId and AppInstance ID , so that it's possible to retrieve custom metrics in Kibana for instance .
Those tags are standard regarding the documentation (https://github.com/cloudfoundry/dropsonde-protocol/blob/master/events/README.md) , so it's important that we can get them on syslog
Thanks