[Q] Proximity sensor problem in call topic

I'm having issues with my z3 compact.like when i'm in a call,the screen gets activated randomly when i move the phone .if i hold it straight onto my ears it works all good.But if i move the phone even if very little around or take away the phone from my face and put it back,the screen gets activated and randomly touched.Anyone having the issue while in call?

my past phones are, Sony live with walkman,HTC desire X,Moto G,LG G3,Moto X.So i know how it should be.Never had that kind of behavious before with sensors.