I have imported my models and created scene states in which I have hidden some objects. Each time I reimport a model, the models appears in all the scene states, even the ones where it was hidden ...

I have imported my models and created scene states in which I have hidden some objects.
Each time I reimport a model, the models appears in all the scene states, even the ones where it was hidden and a few object lose the materials that ive previsouly ch