M8668gr8b8m8

I am using the 6.1.0 version of the mod with KSP 1.4.4 with the historical parts expansion, it seems that whenever i turn on the metals smelter, it drains both oxidizer and liquid fuel from my fuel tanks, i am unsure if this is a feature or not because i have not found this talked about in the forums. I have tried uninstalling and reinstalling the mod, along with removing any other mods that might be conflicting with it, but nothing seems to fix it.