[Bug] Seed Extractor Sound Cut-Out

Issue: Seed Extractor 'working' sound cuts out if you remove seeds from one extractor, but have two working.

Steps to Reproduce:
1) Start with two seed extractors empty.
2) Add enough of 1 type of crop to produce seeds to both seed extractors. The audio of gears turning and working to produce seeds occurs independently for both seed extractors, first sound and then second sound a bit behind.
3) On one of the seed extractors, remove the crop so seeds cannot be extracted. The 'working' gear sounds ceases entirely, even though one of the seed extractors still has a crop to produce seeds and is still working.