It worked once, then after that it doesn't seem to want to work. I haven't tried it on a full 3x3 ripe crop yet, but if there is grass or water in the 3x3, it crashes for sure. I have a crash report.
crash-2018-02-02_23.37.55-client.txt

I just noticed that my current Scythe has -2 durability on it. I'd bet that has something to do with it. I'm not sure why it hasn't broken.