Receiving face book/whats app messenger call put my mobile in vibrate mode

[AC Question]

When I receive any messenger call and except it for 2 or more time my mobile goes to vibrate mode.Restarting it resolve the issue but again if I receive messenger call for 2-3 time same happens again this happens for whats app and face book messenger only not with hangout or other mobile call.I am using Panasonic P55 Novo 4G with Marsh mellow .

Any kind of help from your end is highly appreciated .
Thanks in advance.

 

[ManiacJoe]

In each app, the app settings will often contain options for notifications.
WhatsApp lets you pick the sound and the vibrate for each of its notification types.
I assume Facebook does the same.