When viewing a record in the OPAC that contains alternative editions (supplied by LibraryThing / xISBN) the display of the editions in the "Editions" tab doesn't display metadata such as "editionstatement" and "url". Looking into it a bit, it appears that the method for fetching the metadata was changed from using GetBiblioData($biblionumber) to fetching it via the Koha::Biblios::biblioitem method.