Last paragraph in GitHub - tidwall/gjson: Get JSON values quickly - JSON parser for Go tipped me off. All examples in this page already use the new notation #(...)
and one has to pay attention to the ‘fine print’ to realize why the code isn’t working…
Perhaps telegraf/plugins/parsers/json at master · influxdata/telegraf · GitHub could have a warning about this where is says
“Consult the GJSON path syntax for details and examples.”