A possible reason might be the local operation of the dS components.
Scenario: Room is switched on via a room push-button. The luminaires are then switched off via the local push-button. In the system, however, the room is still "ON". The next time the room push-button is clicked, the room switches to the "OFF" state. The user does not notice any action, as the luminaires are already switched off. Only when a room push-button is clicked again does the room return to the "On" state and the luminaires are then switched on.
This is not an error but a system function.