Chord symbols don't transpose with Notes / Transpose

Ubuntu 14.04, GIT commit: e76f2c7

1) add chord symbol to first measure of My First Score
2) select all
3) notes / transpose
4) select by internal, major second, makes sure chord symbols are checked
5) OK

Result: chord symbols don't transpose

I thought this was working a few days ago - see #40506: Transpose passage with chord symbols does not transpose them in parts. I even added an mtest. But apparently I somehow broke it again.