`guide_legend(reverse = TRUE)` does not reverse legend order

I reversed the legend order with guide_legend(reverse = TRUE), but the legend is unchanged in the plotly plot. The ggplot version is reversed.

library(plotly, warn=FALSE)
#> Loading required package: ggplot2

set.seed(123)

df <- data.frame(x = rnorm(10), y = rnorm(10), group = rep(c("A", "B"), times = 5))

p1 <- ggplot(df, aes(x = x, y = y, color = group)) +
  geom_line() +
  guides(color = guide_legend())
# Legend order default

# Plot with guides
p2 <- ggplot(df, aes(x = x, y = y, color = group)) +
  geom_line() +
  guides(color = guide_legend(reverse = TRUE))
# Legend order reversed

# Convert ggplot with reversed legend order
ggplotly(p2)
# Legend not reversed

Originally posted by @simonsteiger in https://github.com/plotly/plotly.R/issues/2234#issuecomment-1457010264

Inizia eseguendo l’esempio R fornito e confrontando la legenda di ggplot con il risultato di ggplotly(p2). Traccia il percorso di conversione di ggplotly per guide_legend(reverse = TRUE), quindi verifica che il grafico convertito mantenga l’ordine invertito della legenda.