Child components are not tracked in models ??

Hi, I'm facing as strange issue and I need your help. when I move components inside blocks, at the view model the changes successfully applied, but models it seems that grapsejs is not tracking (or I miss something), the parent components (or blocks your can check the image 1 here) are working fine but if I have inner components (or inner 'child blocks', as image 2 here here shows is not track the change) at position 0 it shows that the footerpayment is there but in the view model the user swap the two components so footercopyrights at position 0 and footerpayment at position 1 Thank you !