I have an issue where the autostart doesn't work on furnaces sometimes. The pipes will continue to put materials in there, but it just doesn't start smelting. I think it has to do with the use of the Lights On plugin. I have it configured to have furnaces lit (for aesthetics) when there's nothing smelting in them. If I go to the furnace in question and turn it off and on again manually, everything starts working again. Any ideas?

I've not done any tests with the lights on plugin. I'll run some tests on my server to see. 

Merged post

From what I can see LightsOn sets the furnace flag to be On. This means when auto-start checks it appears to be on and so it doesn't attempt to turn it on.

I'm not sure there is a lot I can do to fix this.

The only way I could see this working was if lights on wouldn't auto turn on a furnace if it had a pipe hooked up to it that was configured for auto start. That would likely require changes on both sides, and lights on doesn't currently have a maintainer.