Collapsed and misplaced Tie under certain conditions

[Thomas Morley]

Hi,

with Metronome_mark_engraver in Staff and a changed TimeSignature a
broken Tie is collopsed and misplaced.

\version "2.19.82"

\new Staff \with { \consists "Metronome_mark_engraver" }
  {
    %% with high line-thickness the bad Tie can be made visible:
    \override Tie #'line-thickness = 10
    f'1~ \break \time 2/4 \tempo "Allegro" f'2
  }

The bug is present since 2.14.2.
2.12.3 returns correctly, though.

I've found these workarounds:

(1)
Use Slur or PhrasingSlur

(2)
Use StaffGroup:

\new StaffGroup
  \with {
    \consists "Metronome_mark_engraver"
  }

  \new Staff
    {
      f'1~ \break \time 2/4 \tempo "Allegro" f'2
    }

(3)
Shape the bad tie:
\new Staff \with { \consists Metronome_mark_engraver }
  {
      f'1
         -\shape #'(() ((-6.5 . 0) (-6 . -0.5) (-5 . -0.5) (-4.5 . 0)))
         ~
      \break
    \time 2/4
    \tempo "Allegro"
      f'2
  }