Overrided color of nested component deleted/reseted when switching variant with variables ?

Hi,
the color of my nested component was reset when I using variable to change this component variant.

My component :

I override the color​​ in the instance and change manualy the variant  → Overrided color was keeped

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I used attach the variant name to my variables → Overrided color was keeped

I nested Component 1 to a second Component 2. Changed manually the variant →  Overrided color was keeped 
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I used variable to automaticely change variant → Overrided color reseted !
 

There are a soluion to keep the overried colors ?