bug boxplot set to horizontal

Hi, I've found a bug in ggplotly() when I want to draw an horizontal boxplot. The code that doesn't work is this:

au2=  ggplot(data) + geom_boxplot(aes_string(x = "Conc",  y ="Class"))+ 
    labs( x = "log2(Concentration)", title = "Density boxplot")
plotly::ggplotly(au2)

where "Conc" is continous and "Class" is discrete. ggplot correctly draw the graph, but when I use ggplotly(), the plot is almost empty (becomes empty if I put also fill = "Class")

in ggplot works fine:

in plotly doesn't work:

If I reverse x and y everything works fine but the boxplot will be vertical. So in order to make an horizontal boxplot that kinda works in plotly I have to use coord_flip() in ggplot2. So this code:

au2 = ggplot(box_data) + geom_boxplot(aes_string(y = "Conc",  x ="Class")) +  
    labs( x = "log2(Concentration)", title = "Density boxplot") + coord_flip()
plotly::ggplotly(au2)

But I have a last problem with ticks. They are a bit rotated:

problem with ticks in plotly:

What's happening??

まず、報告された水平箱ひげ図を ggplot()、geom_boxplot()、plotly::ggplotly() で再現し、水平への直接マッピングと coord_flip() による回避策を比較します。連続軸と離散軸、fill、目盛りラベルの扱いを調査します。水平箱ひげ図が fill 付きで正しくレンダリングされ、目盛りが期待どおりの向きになれば完了です。