LED on climate control is always lit

The passenger side temperature LED (on the temp knob) is remaining dimly lit, even with the car shut off. This is on a 458 Spider but this same panel is on numerous cars (California, 488, F12, FF etc.) The odd thing is it is much brighter with the car turned on and I cannot imagine why the panel would even have any power with the ignition off. Does it with or without the tender connected and does not matter where the temp control or fan control is set. Flickers slightly for no apparent reason.

Have not tried disconnecting the battery as I have an emissions test pending. I can't imagine a single dimly lit LED is causing much if any battery drain but wondering if anyone has seen this before?

Also, that main knob in the TFT panel is a mess (not soft/sticky just scarred), but guessing you can't replace that without replacing the entire assembly.

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