screen doesn't respond if i'm too slow topic

Hi i've got a quite annoying issue
If i turn my HTC one on and i wait a bit,i won't be able to write my pin code because the touchscreen doesn't work,the hover buttons are unusable as well.
I thought at the beginning this problem was only during the startup but since a week i notice that sometimes when i let it to long in standby my touchscreen doesn't work and i'm blocked on the lockscreen.
I'm on viper one 7.0.2 with Elemenatx kernel and i'm S-OFF