\version "2.19.43"
\include "bend.ily"

myMusic = \relative {
  e,8 b' e\4 e b' e r4 |
  \bendOn
  % the bendings are printed correctly
  g,4( gih) g'( gih)
  
  % if I use a chord, the gih' TabNoteHead (3 1/2) appears
  <g, g'>2( <gih gih'>)
  
  % disabling the TabNoteHead with a tweak is cumbersome in my real score (because it's repeated several times)
  % I cannot save a \tweak in a variable, right?
  <g g'>( <gih \tweak TabNoteHead.transparent ##t gih'>)
}

\score {
  \new StaffGroup <<
    \new Staff { \clef "treble_8" \myMusic }
    \new TabStaff \with {
      stringTunings = \stringTuning <e, b, e e b e'>
    }
    { \clef "moderntab" \new TabVoice \myMusic }
  >>
  \layout {
    indent = 0
    \context {
      \Score
      supportNonIntegerFret = ##t
    }
    \context {
      \StaffGroup
      \override StaffGrouper.staff-staff-spacing.padding = #5
    }
  }
}