I hope this is in the right spot.
If you have a still in your forge that is hot enough to imp and you "place" it from the forge onto the ground, it is hot enough that you can immediately fuel it and let it do its thing. If you do, it does not update to show flames or smoke. It stays hot & will process undistilled liquor.
I initially saw this in the preview version with the modern renderer and confirmed it to also occur in the preview version with the legacy renderer.