Screen not waking up

I have a problem with my s7 edge. Whenever i call someone an the screen goes off, i cant get it to turn on. The sensor doesnt work and button pressing doesnt bring anything. I get a black screen till the call is ended and than i can turn the screen with the power button or cerntral button on. Is this a known problem? Is there a solution? Restore doesnt make it better. BTW i am not rooted, stock on 6.0.1

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