Mysterious vibrate\sound problem

[alexta88]

I have a nexus 4 with android 4.2.2, build: JDQ39.
Every time i set my phone on vibrate (doesn't matter how), it only stays on vibrate mode until i press the "call" button. Meaning... I set my phone on vibrate-> I try to call someone (press "call")-> vibrate mode canceled!!! (by it self). And vice versa (same thing from vibrate to sound).
This cycle breaks only when i receive an incoming call (or reboot). Meaning... I set on vibrate-> press call-> vibrate canceled!!!-> set vibrate again-> received incoming call-> after ending the incoming call, i press call again-> vibrate mode stays active!!!. (and now i have the same problem in the other direction...)
This is the cycle, and this is the problem.
If someone has any idea on how to fix this i will be grateful, this is driving me CRAZY!
Thank you

a video is attached...

 

[friedtators]

you are activating silent mode.

to get the vibrate to work go into the setting of each app, like dialer, messaging app, gmail etc