Bad tie placing with tieWaitForNote (v2.8.6)

[Mark Pim]

Hi!
 
The following snippet produces a badly placed tie on the g
 
Yours,
 
Mark
 
\version "2.8.6"
\score {
    \new Staff <<
 \clef "bass"
 \new Voice {
     \set tieWaitForNote = ##t
     \tieDown \stemUp
     r2 r8 d~ g~ a <b g d>4
     d4 d4 d4
     d4 d4 d4 d4
     d4 d4 d4 d4
     d4 d4 d4 d4
     d4 d4 d4 d4
 }
 \new Voice {
     g,1~ g,1~ g,1~ g,1~ g,1~ g,1~
 }
    >>
}