`add_annotations` incompatible with multicategory axis

I've been attempting to plot horizontal arrows using add_annotations in a plotly object with a multicategory y-axis. Instead of positioning annotations along the y-axis, they are all positioned at the origin.

(Because the same behavior occurs with other types of annotation, I have included some text in the reprex as well.)

library(tibble)
library(plotly)
#> Loading required package: ggplot2
#> 
#> Attaching package: 'plotly'
#> The following object is masked from 'package:ggplot2':
#> 
#>     last_plot
#> The following object is masked from 'package:stats':
#> 
#>     filter
#> The following object is masked from 'package:graphics':
#> 
#>     layout

tribble(
  ~cat1, ~cat2, ~start, ~end,
  "a", "f", 1, 2,
  "a", "g", 2, 3,
  "a", "h", 3, 0,
  "b", "f", 0, 3
  ) %>% 
  plot_ly(y = ~list(cat1, cat2)) %>% 
  add_markers(x = ~start) %>% 
  add_markers(x = ~end) %>% 
  add_annotations(text = ":(",
                  showarrow = TRUE,
                  xref = "x", axref = "x",
                  yref = "y", ayref = "y",
                  x = ~start,
                  ax = ~end,
                  y = ~list(cat1, cat2),
                  ay = ~list(cat1, cat2))

Commencez par le R reprex fourni et le point d’entrée add_annotations, puis suivez la manière dont les valeurs de multicategory y-axis sont traitées pour les annotations par rapport aux markers. Reproduisez le positionnement de l’origine avec l’exemple et vérifiez que les annotations utilisant list(cat1, cat2) sont positionnées le long de la multicategory axis sans provoquer de régression pour les autres annotation types.