Insert page with shortcode content – CSS wiped

Hey inserter

I have a plugin that generates membership info table on a given page X with a shortcode. At every plugin upgrade page x is wiped for all content, so building explanatory stuff for a landing page is pointless.

I have designed a new page that will be my frontend and now I insert the wiping page x in-here. It appears that all css does not reach my frontend page so everything looks narrow like mobile and not in a table.

How it looks in page X

How it looks live (Scroll down for the insert)