plotly problem of specifying point symbol within the boxplot

Hi I am trying to specify the point symbol (shape) based on a factor, so that the point shape within the boxplot can be different (which can be very useful for highlighting a group of points). However, it looks like instead of showing different shapes, the third boxplot got split into two boxes.

Can you please advise how to achieve that?

Brief description of the problem

library(dplyr)
data(iris)
iris=mutate(iris, Petal.Width_high=ifelse(Petal.Width>2,"High","Low"))

iris %>% plot_ly(x = ~ Species, y = ~ Petal.Width, color= ~ Species,
                 symbol = ~ Petal.Width_high,
                 type = "box", mode="markers",boxpoints="all",
                 jitter = 0.4, marker = list(size = 10),
                 pointpos = 0,hoverinfo='text',
                 text= ~paste('</br>Species: ', Species,
                              '</br>Petal.Width: ', Petal.Width))

まず、iris、plot_ly、boxpoints="all"、および Petal.Width_high にマッピングされた symbol を使って、提供された R の例を再現します。symbol のマッピングによって 3 番目の boxplot が分割される理由を調査し、ボックスのグループ化を変更せずに各ボックス内で異なる点のシンボルが描画されれば、issue は完了とします。