Z2MQTT Automatically Permits Devices to Join

Hi All,
I recently upgraded the firmware on my Sonoff USB 3.0 Zigbee stick. I noticed yesterday when adding a new light it was automatically added as soon as I reset it and I did not even press the “Permit Join Button”
I never had this in the past and have done some reading, do I now need to add the following to my Z2MQTT config?

permit_join: false