When ore is done cooking, the furnace sounds and looks like it turns off, but the wood inside continues to burn.
Video Demonstration: https://gyazo.com/cfa0c448a33b468b7a8471fe0f52f98f
Furnace appears to stop visually, but wood keeps burning
Do you have any plugins that affect smelting somehow?
Quick Smelt, and Furnace Splitter are the only other plugins I have that affects smelting
It can be quick smelt