Backlight not always working

My Kobo is a Clara HD, and for several months now I'm experiencing some issues with the backlight. I'm not sure if it's something hardware that can be fixed or if it's software.

Whenever I recharge my kobo, the backlight will stop working for a period of time that can range from a few hours to several days.

I've done quite a few tests to try to troubleshoot the problem with no success.

The level of battery does not seem to be directly connected as I encounter the problem no matter if I recharge when the battery is low or high and how long I recharge for.

Factory reset will always instantly fix the problem.

I would really appreciate any insight.