files with ë or é etc do not make it into playlist

[MiniMe]

Yep the filenames were local Mac generated, local Mac appended the right volume address, and then playlist was copied onto NAS. This would break the playlist as you indicated, in case of non ascii.
If I (test) create the .m3u8 while working on NAS folder / server side and not doing anything local Mac the playlist works fully but at the expense of time and flexibility.