i6+ touch strange problem

everything working fine but when i receive call and call sensor works i mean when screen goes off the touch stops working until i lock and unlock screen again.
if i receive call in handsfree mode or loudspeaker mode its totally fine.
that means problem in after screen goes off by call sensor and then wake again touch not working.

i check with software
change sensor cable
change lcd
but same.

expert plz help.