A node filter property will accept the following string format:

{concat: [ get_input: service_name, '--', 'WirelessService']}

The same format added to a VFC property will not format correctly and wont be displayed on the template.

If the string is updated to add curly brackets around the get_input , it will be accepted as a valid value in the VFC property

{concat: [ {get_input: service_name}, '--', 'WirelessService']}

Propose to allow the VFC property accept the same syntax as the node filter.