Why won't incoming calls display on the screen of my Lenovo Vibe K5?

I am getting issue as incoming call not displays on screen, its ringing only in lenovo vibe k5

I facing the same issue, Ringtone is coming but there is no option to answer the call. Could you please anyone tell me. how to resolve this issue. Now I hate why I bought lenovo mobile.

I have done factory reset and subsequently updated system updates through OTA. Not it seems the problem is over.

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