Something has definitely changed because I remember testing this briefly when it was introduced and it worked fine. Luckily I had my own method of cycling these fans already code in my ABC app before the cycle option was built in to the device driver, so this change hasn't affected me.
I'm sure @mike.maxwell will get this sorted out soon enough. In the meantime, feel free to try my ABC app and let me know if you have any issues in that thread. The cycle fan option works fine there.