Started happening after today's update to 2.0.4.109. I tried going into each rule that I was using it in and pressing done, but it didn't seem to fix it.
[app:44] 2019-01-11 05:03:41.552 pm [error] java.lang.ClassCastException: null (alreadyOn)
[dev:37] 2019-01-11 05:03:41.520 pm [info] LR Lamp R was set to 80% [digital]
[dev:37] 2019-01-11 05:03:41.518 pm [info] LR Lamp R was turned on [digital]
[app:44] 2019-01-11 05:03:41.338 pm [error] java.lang.ClassCastException: null (alreadyOn)
[dev:34] 2019-01-11 05:03:41.279 pm [info] LR Lamp L was set to 80% [digital]
[dev:34] 2019-01-11 05:03:41.277 pm [info] LR Lamp L was turned on [digital]
[app:44] 2019-01-11 05:03:40.671 pm [info] Setting dimmers [LR Lamp L, LR Lamp R] to 80
[app:44] 2019-01-11 05:03:40.641 pm [info] Motion active Living Room Motion