Enharmonic spellings of chord symbols not preserved across concert pitch for baritone saxophone

Ubuntu Studio 14.04, GIT commit: 8c7a103

1) new score for baritone saxophone, F minor
2) turn concert pitch *on* (key sig changes from one flat to four)
3) click first rest, Ctrl+K, "F#7"
4) turn concert pitch off then back on

Result: chord symbol is now spelled "Gb7"

This works just fine for alto saxophone, which has the same transposition except for octave, so hopefully not a deep architectural problem.