NoScript is set in my Firefox browser to hide Notifications after 1 second (see screenshot). However, for some reason I can't fathom the Notification is not hiding. As far as I remember, the Notification always used to hide according to my setting. I only noticed this recently.

What am I doing wrong? Anyone else has this problem? How can I fix this issue?
Specs
Windows 10 Home 64-bit
Mozilla Firefox 40.0.3
NoScript 2.6.9.36