How to pickup new MQTT topics in telegraf

Setting up telegraf, I have a working connection with wildcard topic “#” and points passing, but if I add points I don’t see them in Chronograf.

To prove it’s not data format, etc, I renamed a working topic at the source (from meter/frequency to meter/hertz) to see if telegraf picked up the new topic- no.
I can see the renamed point in MQTT explorer and other subscribers.

Do I need to do something to update the topic list? Have tried reloading telegraf and Influx.

Latest versions of TIC.


I partly figured this out- setting persistent_session = false brought up[ the new topics.

Is there a way to update topics if persistent is set to true?