Config Changed warning on Ubuntu 20 / FMS 19.6.3

[danielgbeer]

We are seeing a recurring warning on our Zabbix monitored FMS hosts that the configuration has changed. (Ubuntu 20 / FMS 19.6.3, Zabbix agent 6.2.9)

The trigger that is getting tripped is FMS config change which is inherited from "Soliant FMS Admin API v2", which looks at a JSON array and the only thing that changes is "smtpAccount".
When I look in latest data for the host in question, I can't see the data that the Zabbix Problem references (the JSON block) so I'm struggling to understand where it's coming from.

There is no actual change on the server and it appears that this value (looks like an encrypted string) changes every time zabbix does its check.
I recall seeing an explanation of what that element actually is (in the past), but I've been looking for the last hour mins and can't find it now.

My questions:
I can't work out where that JSON data comes from - is it a call thru the python script from the template?
Can someone explain what it is and why it is changing (and if it's possible for it to remain constant)
If we can't remove that value it, Is there some way to either omit the smtpAccount element from the data returned so we stop getting the error?
Is there some other solution to this that I haven't thought of?

Thanks!