left justifying text over multimeasure rests

[Paul Scott]

In 2.11.37 it seems that trying to get left aligned text over 
multimeasure rests only works under some conditions.  In the following 
example only the first case is left aligned.  This is what I am 
observing in my real examples.

\version "2.11.37"

\new Staff
{
 \set Score.skipBars = ##t
 << s4*0^"first" R1*2 >>
 << s4*0^"second" R1*2 >>
}

Paul Scott