New widgets in Sidebar not visible

Hi,

something weird is happening withmy sidebar for blog posts.

I added an image widget in the sidebar with my lead magnet but it’s only visible in the last post I published after I added the widget.
In all older posts the image widget is not apperaring.

Check this please.

Latest post.
https://developingthebusiness.com/3-aplicaciones-para-ventas/

First image in the sidebar OK

Previous posts. No image
https://developingthebusiness.com/estadisticas-de-ventas-2/
https://developingthebusiness.com/inteligencia-artificial-en-ventas/

I don’t know what to do.

Can you please help me?

Thanks!

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