That is a known bug that the harvesting gear disappers, here one of the Community managers confirmed that the develpers are aware of the issue and are trying to fix it or inform further about what is going on.
Yes. I know, and this is inconvenient. But am everybody is talking about Harvesting Gear (by that i mean Harvesting for Hemp, Silk, etc.). But I am missing my Logging Gear (wood) and I have not seen anyone reporting that missing. Am i the only one? Did I delete it by accident? I would like to know if that is also an issue.