log transformation doesn't work for 3d plot in plotly

I want to make a rotatable 3d plot. For now I'm using plotly. The following code works:

require(plotly)
fig <- plot_ly(mtcars, x = ~wt, y = ~hp, z = ~qsec, type="scatter3d", mode="markers")
fig

Now, I want to move one or more dimensions to log scale. From the plotly manual I thought I should use layout(), but this doesn't work:

fig %>% layout(xaxis = list(type = "log"), yaxis = list(type = "log"))

It builds the same plot, both axes remain linear. What I am doing wrong?