It seems that the SNMP Modular input does not take into account the value of host specified in the "host field value" field when you create an input. It always set the "Destination" field as host. Is it a normal behavious, a limitation or a bug ?
That is expected functionality by design.
The polling output overrides the host field that you can set in the UI.
I should probably remove the UI option to set it.
Having the same issue. Notified author, and we are working through it.