Black screen during calling

[Gmb1985]

My scrscre gose black when i make a call I have no screen protecter nothing on it is there anyway to turn it of 

[lockeers]

I have the same problem  when I calling I have black screen and I can't do anything  I can't the end of call and nothing. I test sensor on xperia test functionality and probably after last update to pie there was some bug in new software. Someone know how to fix that