Hello,
(which also plays a ding sound!)
That's why it's a good idea to disable Notification Sound in Windows Notifications Settings.
Actually it's a good idea to disable all alert and system sounds, when using a computer for audio production.
That said, then i'm not sure about how the ASC Notification "Once" work. I agree it sound like it only should show a single time in total - at least for a session. Do you respond to the notification, when you get it, to tell you have seen the messages?
I don't recall if this have annoyed me.
Please keep in mind, that posting in this forum is'nt the same as contacting Arturia support