To be completed by the original poster:
CMS Version
2.3.7
Player Type
Linux
Player Version
Latest, freshly pulled from Snap depot
Issue
I’m using the notification widget to display short information messages on targeted displays. It works fine, except one thing : whatever the release date and time I may set for a notification, it is immediately displayed on the player by the Notification widget.
It seems that the notification widget do not care about notification schedule as long as the player is added in the audience list.
If I set up a test notification with a correct schedule and add only my user in the audience, then the notification is properly fired at the right time and (fortunately 
not displayed on the player.
I’m wondering if this is the expected behaviour of the notification widget or if this widget is expected to follow the notification’s schedule ?
Kind regards.
P.