Hi everyone, there is an updated device handler that should fix this issue. After you install and publish it the device needs to receive a report in order for this fix to work. Take note of the change log:
2020-08-14: Fix for SmartLighting app not working with recent change in new SmartThings app.
** Device needs to receive a report after the device handler is updated for this to start working.**
** User can force a report by turning the device on or off, refreshing, etc.**