Reimport Substance?

This doesn’t import newly added materials… or does it? At least for me it doesn’t… after adding a material in substance and reimporting the sbsar file in ue4 the new materials don’t get imported… can anyone confirm this behavior? Is it on purpose? Or is this a bug?

//edit: just figured out, it does. However not automatically. You have to right click on the imported sbsar and click Create Graph Instance. There you’ll find the new materials! A bit confusing in my book.