tuplet bracket starts too late after shorter-rest

[Stefan Thomas]

Dear community,
I have a problem within the below quoted snippet.
The Tupletbracket starts to late, I think because of the shorter-rest. What do I have to do to get the full-length?
Here is the snippet:
%%%%%%%%%%%%%%%%%%
\version "2.14.2"
le = { \change Staff="left" }
ri = { \change Staff="right" }

RIGHT = {
  \time 1/4
  \scaleDurations #'(4 . 5) { d'' 16 \le cis' \ri r16 <bes'  f'' a'' b'' >8-> }
}
LEFT = { \clef bass 
  \once \override TupletBracket #'X-extent = #'( -33 . 33 ) % has no effect
  \times 4/5 {s8 r16 <fis c' es' f'  >8 } }

\score {
  \new PianoStaff
  << \new Staff="right"  \RIGHT
    \new Staff="left" \LEFT >>
}
%%%%%%% END %%%%%%%%%%%%