How to fix notification that did not show the label?

[AC Question]

My phone (Samsung S3) didnt show notification for all messages that i receive from Facebook, whatsapp, Line, and Wechat. the sound, LED lamp, and vibration still working when it receive messages, but the notification label on the up right screen did not show at all, also it wrote "No Notification".. Anybody know how to fix it please? thanks.