Bullet Charts: Indicator Delta Reference shows dash symbol when value and reference are equal

I am creating bullet charts using the guidance found here: https://plot.ly/r/bullet-charts/

All is working as expected, however when the value and reference values are the same, the rendered plot shows no difference. Just a straight line. I should say 0 as there's a difference of zero.

Example below with straight line for difference rendered.

  plot_ly(
    type = "indicator",
    mode = "number+gauge+delta",
    gauge = list(shape = "bullet"),
    delta = list(reference = .333, valueformat='%', relative=FALSE,position='right'),
    value = .33,
    domain = list(x = c(0, 1), y = c(0, 1)),
    title= list(text = "Profit"),
    height = 150)
  

However, if I add an additional digit to the reference or value as shown below, a percent difference of -0 or +0 is shown.

 plot_ly(
   type = "indicator",
   mode = "number+gauge+delta",
   gauge = list(shape = "bullet"),
   delta = list(reference = .333, valueformat='%', relative=FALSE,position='right'),
   value = .33,
   domain = list(x = c(0, 1), y = c(0, 1)),
   title= list(text = "Profit"),
   height = 150)

plot_ly(
  type = "indicator",
  mode = "number+gauge+delta",
  gauge = list(shape = "bullet"),
  delta = list(reference = .33, valueformat='%', relative=FALSE,position='right'),
  value = .333,
  domain = list(x = c(0, 1), y = c(0, 1)),
  title= list(text = "Profit"),
  height = 150)

まず R の bullet-chart の例を再現し、plotly.R におけるインジケーターのデルタ描画パスを追跡します。issue ではソースファイルもテストも指定されていません。関連するカバレッジを特定し、値と参照値が等しい場合にデルタがゼロになることを示す回帰チェックを追加してください。