Hi,
You need to post your config for the monitor because we can't see how you configured it.
Also maybe this can help:
A heartbeat monitor which would do the equivalent of this:
# nc -v 10.4.3.5 -port 1525
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connected to 10.4.3.5:1525.
^C
would be this:
- type: tcp
schedule: '@every 5s'
hosts: ["10.4.3.5"]
ports: [1525]
But you didn't post your config so it's hard to help.
Martin