If a devices state changes (on/off) AFTER you load the Devices page, the state is not updated unless you exit & reload the app, or deselect the hub.
Ideally these changes would be event driven, but a Refresh button would help…it’s hard to turn off a light when Devices thinks it is already off.
Actually, it would be ALSO helpful if Devices ALWAYS sent the on/off command, regardless of the devices’ current state.