When you use the ARP feature “Play sound until I click the notification box”, a Windows 10 bug sometimes does not stop the sound even after the user has clicked the notification.
Windows 10 bug reference

As this is a Windows bug, we cannot prevent it entirely but we have provided a solution if users run into this Windows bug. There is a mute icon in the extension menu, simply click the mute icon to stop the notification sound, as shown in the screenshot below.