Buttons light switches off randomly

[Pfe]

I have this unit:
JY-UOS03P4
In the settings I select "blue" for the buttons light colour.
It works ok....but after some period of time, sometimes it lasts days, the light switches off, the buttons don't work properly and in order to get the blue colour on and the buttons properly working again, I have to go again to settings and choose the blue colour (even though it is already checked and selected).
Any suggestion???
Thx in advance

[CraigCWilson]

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