Hello!
Not so long ago I've noticed that the system voice (which is used to pronounce notifications) doesn't change. Even if I apply some different voice in System Settings notifications are still pronounced by the old one (even after I delete that old voice).
If want the content to be spoken and press Option+ESC it uses the correct voice.
So, what can I do except reinstall the system? Thank you!
MacBook Air, OS X El Capitan (10.11.5)