Some issue on import/export between two sites at bix texts url and meta data levels

created a simple page in two languages in site A, on a big text content of this page defined a link t to page of this site. defined a category and description on my page
Export this page and imported it in an other site, here the issues:

On my destination page
The metadatas (category and description) are not copiped.
My link to the page doesn't work , note that the href in source code is correct but clicking on the link doesn't launch the same url in bowser