My KA1 is possessed!
When I turn lighting off (to 0%) and turn off auto modes for both regular and natural light, sometimes the device automatically turns on backlighting again when I'm reading!
If I then go into to the lighting menu the auto option is magically turned on - even though I'm sure I didn't do it! The light %age has been at a different level each time this has happened.
My guess is that the ambient light sensor is in "always on" mode, and there's a bug in the firmware that allows the auto setting to switch from "off" to "on", at which point the backlighting ramps up to a percentage that depends on the ambient light reading.
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