Default No SENSORS input at random

I got this strange issue:
at random, my tablet stops using sensors. I see it when I try to turn it to horizontal position from landscape - it doesnt turn the screen. Then I go to this little nice "sensor test" program I downloaded from googleplay and I see all the sensors at 0 ! I see orientation,accelerometer,magnetic field,light and gyroscope all on 0 and moving, covering laptop doesnt do nothing. Only reboot makes difference.

Do You think it could be the software (like custom kernel ) or hardware related problem ? Anybody had this ? I got unlocked Nexus 7 2013 32 Gb (no LTE), using standard rom 4.4.3 but with ElementalX-N7-2.10.1 kernel + boot-ts09-lock.img used for screen touch-related issues.

I was using this setup without any problems (except "standard nexus 7 2013 screen touch problems") for some months, month ago I clicked to download the update from google but it didnt install (most probably cause I got custom kernel/unlocked bootloader), still there were no issues till 2 weeks ago...

Any help appreciated !
Samsung Galaxy S3 I9300 / Lumia 920 / Nexus 7 (2013) 32 Gb