In the Howto Multiple field values and replacing the double backslash \\ Florian recommends to use Convert → Tag - Tag and a format string such as $meta_sep(artist,; )to convert a tag that contains multiple values into a single value tag.
Using his example Peter Gabriel\\Kate Bush in the ARTIST field, I get to this dialog box
When I now press the preview button, the file preview.txt does not correctly display the current, multiple values of the the
ARTIST field, actually only the first value of it corresponding to $meta(artist,0) is shown:
[1] C:\xxxxxxxxx\01 Don't Give Up (Edit).mp3
"Peter Gabriel"
--->
"Peter Gabriel; Kate Bush"
Obviously the 'before' line should read "Peter Gabriel\\Kate Bush".
This issue could be misleading, if for example I use $meta(artist,0) as format string, because then the old and new strings in the preview are the same, suggesting that nothing happens with applying this convert command.
Probably this is a bug?