Were there any changes since it worked last? I'm not sure.
About a week ago I tried using a different smartphone with stock Android 8.0. At that time, both the basic and advanced scheduling started working. Again, I never saw the advance scheduling working before. I thought maybe IT WAS the OS, but the very next day things went back to not working.
Since then I've been testing both basic and advance scheduling with both the custom and the stock Android and nothing. Right now it is not working (again, the sensor works fine provided I turn it on or off manually).
I am not angry at this whole thing, just a little bit dissapointed. I got a great deal on these sensors and I've been testing how reliable they are as a home alarm... and while I expected some unreliability due to the internet connection I just don't think the whole system is reliable enough. I'm happy to keep posting issues so maybe you can fix them down the road.