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??

Beginne damit, den gemeldeten horizontalen Boxplot mit ggplot(), geom_boxplot() und plotly::ggplotly() zu reproduzieren, und vergleiche dabei die direkte horizontale Zuordnung mit der coord_flip()-Umgehungslösung. Untersuche die Behandlung kontinuierlicher und diskreter Achsen, von fill und von Tick-Beschriftungen; abgeschlossen ist die Aufgabe, wenn horizontale Boxplots mit fill korrekt gerendert werden und ihre Ticks erwartungsgemäß ausgerichtet sind.