The computer controlled players have been cut of from any oil resource, still their manufacturing involving plastic goes on! How is this possible? The same thing goes on with their bed and paper manufacturing; i have the only source of timber but their manufacturing goes on.

The "Purchase"-box is empty, still the manufacturing goes on for year after year after year.

Is this a common bug or have I missed something?

Maybe there is still enough plastic in the car body manufacturing unit. I forgot what the bars represent there.