selectizeInput in RShiny does not allow next input to be "tabbed" to when too many choices?

Question

(When I say "tabbed", I mean keyboard's Tab button to move around.) It appears selectizeInput() does not allow me to use "Tab" key on the keyboard to highlight next input (in example below, textInput) afterwards. UPDATE: It seems to have to do with the fact that my times variable is length 96 - perhaps that's too long? (when I use tail(times,5) instead, it seems to "tab to next input" just fine.

times <- gsub(" ","0",sort(apply(
  expand.grid(seq(0,23),c(":00",":15",":30",":45")),1,
  function(x) paste0(as.character(x), collapse=""))))

shinyApp(
  ui = function(req) {
    fluidPage(
      selectizeInput("time", "Time:",choices=times),
      textInput("descr","Description:")
    )
  },
  server = function(input, output, session) {      }
)

Thoughts, anyone?