bulmaDivider does not render well if vertical is TRUE on mobiles or tablets

[DivadNojnarg]

the display is awful on mobiles/tablets:

 library(shiny)

 ui <- bulmaPage(
  bulmaContainer(
   bulmaColumns(
    bulmaColumn(
      width = 6,
      bulmaBox(
         "test"
      )
    ),
    bulmaDivider(vertical = TRUE),
    bulmaColumn(
      width = 6,
      bulmaBox(
        "test"
      )
    )
   )
  )
 )

 server <- function(input, output, session) {

 }

 shinyApp(ui = ui, server = server)