Description of plugin "All stacks of wood will burn at once when nothing cookable is present"

This does not seem to be happening for me?

There isnt much to edit in config either that would suggest enabling/disabling this?

After considering its impact on compatibility with other furnace plugins, I have decided to temporarily remove this feature from the latest release. I understand that this might not have been the answer you were hoping for, but I might revisit the idea of adding a similar feature in the future, so stay tuned!