ggplot() does not display aesthetic in tooltip when aesthetic name == 'group'

[phauchamps]

Description

When converting a ggplot2 plot to plotly using ggplotly(), the generated tooltip does not contain aesthetic entry if its name is equal to 'group'.
Would it be like there are some 'reserved' word that can't be used as aesthetic names, in order for the tooltip generation to work correctly ?

Reproducible example

library(ggplot2)
library(plotly)

data(iris)

p1 <- ggplot(iris, aes(x = Sepal.Length, y = Sepal.Width, col = Species)) + 
    geom_point()

p1

ggplotly(p1, tooltip = "Species")

# => works fine!


iris2 <- iris
iris2$group <- iris2$Species

p2 <- ggplot(iris2, aes(x = Sepal.Length, y = Sepal.Width, col = group)) + 
    geom_point()

p2

ggplotly(p2, tooltip = "group")

# => does not show 'group' in tooltip

ggplotly(p2, tooltip = "all")

# => shows 'Sepal.Length' and 'Sepal.Width', but not 'group' in tooltip

Environment information

R version 4.4.2 (2024-10-31 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows 10 x64 (build 19045)

Matrix products: default


locale:
[1] LC_COLLATE=English_United States.utf8  LC_CTYPE=English_United States.utf8    LC_MONETARY=English_United States.utf8
[4] LC_NUMERIC=C                           LC_TIME=English_United States.utf8    

time zone: Europe/Berlin
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] plotly_4.10.4 ggplot2_3.5.1

loaded via a namespace (and not attached):
 [1] vctrs_0.6.5       httr_1.4.7        cli_3.6.3         rlang_1.1.4       purrr_1.0.2       generics_0.1.3    jsonlite_1.8.9   
 [8] data.table_1.16.4 labeling_0.4.3    glue_1.8.0        colorspace_2.1-1  htmltools_0.5.8.1 scales_1.3.0      grid_4.4.2       
[15] crosstalk_1.2.1   munsell_0.5.1     tibble_3.2.1      fastmap_1.2.0     yaml_2.3.10       lifecycle_1.0.4   compiler_4.4.2   
[22] dplyr_1.1.4       htmlwidgets_1.6.4 pkgconfig_2.0.3   tidyr_1.3.1       rstudioapi_0.17.1 farver_2.1.2      digest_0.6.37    
[29] viridisLite_0.4.2 R6_2.5.1          tidyselect_1.2.1  pillar_1.10.1     magrittr_2.0.3    tools_4.4.2       withr_3.0.2      
[36] gtable_0.3.6      lazyeval_0.2.2