Update Button badly mixes legenditems of plot (`updatemenus`)

Hi, I´ve come across a weird thing:

I tried the plotly "Update Button" on a plot with a legend. At first everything seems as expected. But as soon as you toggle the plot with help of the update button, the legend is mixed in odd ways. Sometimes the legend even does not correspond to the data at all (e.g. change sensors to 4 in reprex).

Heres an example to play around

library(plotly)

df <- data.frame(
  car =    c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2), # two cars
  sensor = c(1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5), # with 5 sensors
  x =      c(1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2), # sensor data
  y =      c(2, 1, 3, 5, 6, 5, 3, 2, 1, 6, 7, 3, 8, 1, 5, 9, 2, 2, 5, 5)
)

updatemenus <- list(
  list(
    type = "buttons",
    buttons = list(
      list(
        label = "Car 1",
        method = "update",
        args = list(list(visible = list(T, F)))),
      list(
        label = "Car 2",
        method = "update",
        args = list(list(visible = list(F, T))))
    )
  )
)

fig <- plot_ly(type = 'scatter', mode = "lines")
fig <- fig |> add_lines(~x, ~y, data = df[df$car == 1,], name = ~sensor)
fig <- fig |> add_lines(~x, ~y, data = df[df$car == 2,], name = ~sensor, visible = FALSE)
fig <- fig |> layout(
  updatemenus = updatemenus,
  legend = list(title = list(text = "<b> Sensor </b>"))
  )

fig

首先，使用 plotly 更新按钮运行提供的 R reprex，并改变传感器数量。跟踪 updatemenus 的可见性更新如何影响图例，然后验证每个按钮留下的图例项都与当前可见的数据匹配，并确认现有示例不再显示混合条目。