Back-light knobs on RH console button vs axis/mouse movement discrepancy

[virgo47]

These two knobs move differently when activated with keyboard/buttons vs axis:

With axis bindings (or mouse wheel) they move from ~8 to ~4 o'clock, with key/button bindings they start at 12h and end at 4h (end is the same). That is, for keys, they travel just the upper half.

Strangely enough, the effect is not bound to the knob movement though. If I use keys/buttons, the light intensity goes from max (4h) to min (at 12h), but the moment I touch the knob with axis binding or use the mouse wheel on it, it immediately switches to the 8-4h range (any movement around 12h makes the effect go from 0 after key action to ~50% effect).