[SHR] Why is the Powerbutton sometimes red and sometimes blue while loading

[Detructor]

Hi,

I just wanted to know, why the powerbutton (right side) is sometimes red
and sometimes blue while loading per USB? With the wallcharger it's the
same. Sometimes red and sometimes blue.

Is it a bug? Or does it show if the neo is loading with more power than
"normal"?
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