\parenthesize script on cross-staff-beamed note fails

[Malte Meyn]

Hi list,

in the following example, the \parenthesize command doesn’t respect the 
width of the parenthesized script (same problem for other scripts like 
fermata).

%%%%%%%%%%%%%%%%%%%
\version "2.19.25"

<<
  \new Staff = "upper" {
    s4
  }
  \new Staff {
    b16-\parenthesize-> b b
    \change Staff = upper
    b
  }
>>
%%%%%%%%%%%%%%%%%%%

Malte