Show year only on the first axis tick or on change

Question

I have a question regarding axis formatting of dates in R plotly.

I want to specify custom date tickformats on my x-axis as follows: '%a %e %b \n %Y' But I only want to show the year on the first xaxis tick. As it would be too weird to repeat it for each tick label.

I have the following small example:

dt <- data.frame(
  x = as.Date(c('2013-02-04', '2013-04-05', '2013-06-06', '2013-08-07', '2013-10-02')),
  y = c(1,4,5,6,2)
)
plot_ly(data = dt, x = ~x, y = ~y, type = 'scatter', mode = 'lines') %>%
  layout(xaxis = list(tickformat = '%a %e %b \n %Y'))

Which is the exact same setup from this javascript example where it does work!

This post with python also seems to work. So I am not sure now what I am doing wrong in R? Or if this is a bug?

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Edit: I would like to avoid using ggplotly and directly work with plotly as this provide greater control.