Not sure if this only applies to platform resources, but the reproduction is this:

1. Configure an SNMP platform resource that contains some services (i.e. a Network Host/Device with some network interfaces)
2. Change the IP address of the host/device
3. Change the IP address in the HQ resource Configuration Properties

At this point, the metrics on the platform resource will begin collecting again using the new configuration, but the services like the network interfaces will still have the old configuration and will not be able to collect metrics.

Workaround: re-submit the config on each service by navigating to the Configuration Properties, clicking Edit, then Click OK without changing anything. That will force the update from the parent.

Expected behavior is that the service configuration is updated automatically when the parent resource configuration is changed.