A download of the problem is here:
My FLAC encoder is trashing UTF8 character
and possibly these too (similar encodings)
ê ë è
when the vorbis comment tag is imported (at least) from a file. See the
file for the call to flac.exe. The .cue that is imported (as a comment) is like this:
I have not looked at flac.exe source for why this happens. The build I am using is from the source package dated 19 Jan 2017.
It doesn't know the file is in UTF-8 format already so it re-encodes it. Use flac.exe --no-utf8-convert --tag-from-file=CUESHEET=Exposé-Exposure.cue.
Thanks. That trick did it.