Improper markup placement in 2.8.0?

[Shamus]

Again, don't know if this has been beat to death, but how do I get the
markup to the correct place? In this example instead of being engraved
at the end of the 4th bar in the first stave, it gets bumped down to the
next line before the clef! You can see the correct position for the
markup if you take out the \break (i.e., it works correctly with the
exception of the case where the bar occurs at a page break).

Bug or feature?

-- Shamus

\version 2.8.0
\score
{
\relative c'
<<
\new Staff
{

c4 d e f | c d e f | c d e f | c d e f |

\break

\once \override Score.RehearsalMark #'self-alignment-X = #right
\mark \markup { \italic { to Coda } \hspace #1.0 \musicglyph
#"scripts.coda" }

c4 d e f | c d e f | c d e f | c d e f |

}
>>
}