Hi thanks for answering, just to make sure you understand what I pointed out.

The problem is not that the productivity bar resets when a recipe is switched
The problem is that when switched back to the original recipe the productivity bar is not restored back to its original value for that recipe ...

When switching a recipe using the "Set Recipe" circuit logic in a production building the productivity bar (the purple bar) inside the building resets back to 0 even if you switch back to the first recipe, it would be nice if the building remembered the productivity level it had when switching back ...