Dear Xara...

I created a large Text Area and inserted Lorem Ipsum text of four paragraphs with a linefeed between.
I changed the first to Heading 1, Fully Justified, Yellow Paragraph Background and ALL CAPS.
I placed a Repel Text Under Shape over this and copied (Ctrl+C) the Heading 1 paragraph.
I then simply paste (Ctrl+V) this text as a Text Line.

Bug - The lines of text that had words repelled "remembered" the repulsion and foreshortened the line accordingly. // This is an oversight that has probably been around since the concept of SPANning paragraphs.
Bug - the quadruple-click text selection now seems to fail. // Probably semantics in the guidance as a Text Column typically does not have wrapped lines.

I can Edit > Paste > Paste in current layer, producing a Text Column, with the right styling and multi-click selection.

Acorn