I have started having the exact same problem in the past week, I left messages for the support team and the only help i got was them saying if you're confident enough take the machine apart and unplug/plugin the keyboard ribbon cable sure that fixed it bit they basically offered no help with the...
i have had this problem with mine since I got it (2 months late) but I had to keep re-enabling the key lighting in the bios and that fixed each time but if it resets or you turn it off the change reverts, so now i just leave the light bar off and keep the keyboard on.
