'Funny' problem-lock screen waking up with every notification

Hi guys,i have i quite interesting problem with my daily driver,and i just cant find solution.Sold Mate 7,bought Note 4,great phone,besidea this problem.

With every notification(whatsapp,messenger,sms..), lock screen is waking up,shine 5s,and then,if there arent any new notification,simply turns off...I know that there is similiar problem with stock sms app,but this is new..

Tried to disable message preview,same story..screen shine,with no preview, tho..

Is there any solution for this,app,or ..? Tried wipe cashe,factory,lock screens from Play store,nothing..

P.S...English is not my native,so i apologize for grammar,i'm sure that some fault is up there :)

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