Just to ask, don’t hang me please 
Do the crafting stations, you mentioned the ones require fuel, stop because you run out of fuel or changed it?
I get annoyed at myself for starting a furnace with coal, then put oil in it at once the last coal is used you would have to restart the furnace again so it uses oil as fuel.
Other thing I noticed is the cauldron. I got one to produce warpaint, so there is fiber and sticks in it, as well as oil.
Now when I turn it on, despite last using oil, it starts to use fiber as fuel, do I remove the fiber it starts using sticks, so end up removing both for the cauldron to use oil as fuel.
Since the Wheel of Pain in MP also do stop after a server restart I am not surprised this happening to crafting stations in SP, experienced it as well, since leaving SP basically means you switch off the server.