I'm making a complex scene with a character holding one of the built in torches, and sometimes when I save the torch light gets bugged and gets brighter and brighter, even when I set the intensity to zero. It's happened a couple of times, and I think it is due to taking the thumbnail image for the save. I've had to replace the torch, but I don't want it happening to other people and breaking my scene lighting. Does anyone know how to fix/avoid this?