Secondary resources from millstone can be forced by continuing to use after processing

[DavGam]

Describe the bug
The millstone can be spun for longer than needed and continues generating secondary resources during this time.

To Reproduce
Put a single wheat or sugar cane into the millstone and spin for around fifteen seconds. Spin longer for more gain.

Expected behavior
For the millstone to lock once all ingredients are consumed and all primary resources have finished generating.