Guys, I updated my iPhone 6 to iOS 9 on its release and started seeing a weird issue where a push notification would appear on the screen but no sound alert. This is not related to ST. But some iOS user using ST may well notice this. This is very intermittent and annoying, So, watch out for this. WhatsApp, Kuna, FB messenger are all affected. Not everybody is facing this. Apple forums are reporting the same and several sites if you google.
I am facing this issue. Anybody else noticing this?