Spring arm component doesn't show up in Blueprint viewport

Development Rendering
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Hi,
I have created a blueprint class with some component that you can see in the picture below:

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image1739×814 180 KB

My problem is that I have created another blueprint based this first blueprint but inside the second blueprint if I select the SpringArm component it doesn’t show up in the viewport. (picture below)

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image1682×777 166 KB

I can’t see the transformation of the SpringArm component in the second blueprint.
Why is that? how can I solve it?
Thanks a lot