DC size changes when I add inside another DC

Hello,

I am doing bespoke boxes using sketchup dynamic component for the CAD process and VCARVE pro for the CAM process.

I have built dynamic boxes that works perfectly.

To ease to produce process, I have recently decided to add inside each piece of another dynamic component with fixed dimensions inside to number each part.

But I have issue when resizing

if I add another DC into the bottom piece for instance, then when I resize the entire boxes, here is what I get

Can you please help me out with this issue ?

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