cant update active/selected row background color for datatables

Updating table-active-bg has no effect for preset of "shiny" or "bootstrap", while table-color does work, for instance. See reprex:

library(shiny)
library(DT)

my_theme <- bslib::bs_theme(
  version = 5
)

my_theme <- bslib::bs_add_variables(
  my_theme,
  'table-active-bg' = 'red',
  'table-color' = 'purple'
)

ui <- bslib::page_navbar(
  theme=my_theme,
  bslib::nav_panel('test', DT::DTOutput('table'))
)

server <- function(input, output, session) {
  output$table <- DT::renderDT({
    mtcars
  })
}

shinyApp(ui, server)

Noticing also that there may be mixed use of selected and active classes when selecting datatable rows. Not sure which is the right one. I'm using the following code from tables/_rules.scss as reference to make me think I should update table-active-bg:

  tbody td.active,
  tbody tr.active td {
    background-color: var(--bs-table-active-bg);
  }

Reproduce the behavior with the supplied Shiny and DT example, then inspect tables/_rules.scss and the active versus selected classes emitted by DT. Confirm which selector controls selected rows and verify that changing table-active-bg affects the relevant rows for the shiny and bootstrap presets.