Vibrating in calls every few seconds

My Note 4 keeps vibrating when ever I'm in a call and I have no clue why.

Asus, zenfone 2 vibrating itself

Hey, my ASUS vibrating twice and screen is turning on, but with no notifications... it never happened at home when mobile is on table. Always, when i am outside house and keep mobile in a pocket. From time to time is vibrating, then I pull out from pocket, screen is on, and that all, what it can be?, I am on stock Rom

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My nexus stopped vibrating

Hello!
I just realised that my phone does not vibrate anymore at all - not when I recieve a call nor when I recieve a notification of any sort. It doesn't even vibrate when I'm setting the volume to vibrate mode with the rockers. I checked the profile and it is set on Default just like always (I haven't touched any profile settings ever). I downloaded a massage app and even with it running the vibration motor doesn't work at all. I haven't ever dropped or hit my phone in any way, it just randomly stopped vibrating. Do you have any suggestions on how to fix this issue? I'm running the latest CM 12 nightly build with a stock CM kernel (I have some doubts that it might be causing the problems) and have been running the nightlies even before the issue.
Thanks in advance!

disable vibrating on messages

Hello

I'm looking for disable ALL vibrating for messages, whatsapp, emails, etc... I just want to let vibrate my phone when i receive calls.
I disabled also it on each app (like WA) but nothing happens.

Any idea?

thanks in advance

cheers