SharedData's selection() method not firing

[cpsievert]

library(plotly)
library(shiny)
library(crosstalk)

m <- SharedData$new(mtcars)

ui <- fluidPage(
  plotlyOutput("plotID"),
  verbatimTextOutput("brushInfo")
)

server <- function(input, output) {

  output$plotID <- renderPlotly({
    p <- ggplot(m, aes(wt, mpg)) + geom_point()
    highlight(ggplotly(p), "plotly_selected")
  })
  
  output$brushInfo <- renderPrint({
    m$selection()
  })
  
}

shinyApp(ui, server)

[cpsievert]

Ahh, this actually works if m is created within the server function. @jcheng5, should the example above work? Or should this classify as user error?