I have a problem showed as the pictures below.

When my boss ask me and I comment directly in comment box but it just display on Task page, not display on Feed page. And the important is the notification didn't showed too.

It is a bug? or my mistake?

Picture 1: The Task page (it shows my comment with account vanvt)

Picture 2: The Feed page (it doesn't show my comment (from  vanvt), it just shows comment of Admin)