My phone screens doesn't lock during call

[Android Central Question]

Hello,
I am using Moto g5s plus with android 8.1.0 .
I am facing problem with phone home screen which is not get locked during calls.
Whenever i took calls screen doesn't locked and it open many screen due to touch.

 

[Rukbat]

The proximity sensor is probably bad - it would have to be replaced.

 

[B. Diddy]

Welcome to Android Central! Does it also happen in Safe Mode? https://motorola-global-portal.custhelp.com/app/answers/indevice_detail/a_id/116299/p/30,6720,10165. If not, then some app you installed is probably interfering with the sensor. You'd have to uninstall apps one by one until the problem goes away.