When I publish a post to a child site and the custom post field contains text with formatting for example paragraphs or numbered lists, bullet lists, etc. The result is not as expected. Instead of a paragraph, there are the letters ‘rn’ (which looks like it is short for 'return’).
Ok, that was my misunderstanding, in that I thought that the Custom Post Types extension would include the fields also. Hopefully, it will be included in the future.
I just tried to publish a post with the standard ‘content’ box which is a custom post type but not a custom type field and the formatting does not pull through.