I am having the exact same problem for the last 2 weeks.  I have 3 DSP-W110, 2 in the barn to control fans for the horses, 1 in the house.  There was a power outage and internet outage due to a storm.  Since then the schedules do not work correctly.  If I unplug the switches, plug them back in, they may work for one cycle.  I have tried changing the schedules, deleting and recreating the schedules, even reset one switch, to no avail.  I can control the switches via the app.  This is frustrating.  I like these switches but may have to switch brands.