grace note suppresses instrument name!

[Richard Shann]

Consider:

\version "2.19.43"
        \new Staff 
            << 
                \set Staff.instrumentName = \markup "Treble Recorder"
                 {
                   \grace f'8
                   g'4  g'
                }
            >>

with the grace note the instrument name is not printed, without it, it
is. Should the syntax used here work? I realize that by replacing << >>
with {} it works, but is there a good reason why this <<>> syntax
suddenly fails when a grace note starts the music?

Richard