Bookmarking doesn't work anymore with Markdowns (Shiny Engine)

Until few weeks ago it was possible to use bookmarks within Markdown documents with shiny engine. Looks like it is not working anymore. The button appears, the URL is displayed, but when used the fields are not populated.

Am I doing something wrong? I am sure it worked in the past!

Here an snipped of the code I used inside RMD to have the bookmarks working.

library(shiny)
knitr::opts_chunk$set(echo = TRUE)
shiny::enableBookmarking(store='server')
bookmarkButton()
shiny::textInput('test',label='test')
renderUI(HTML(input$test))

Header of RMD

title: "testbookmark"
author: "Max"
date: "June 19, 2018"
runtime: shiny
output:
flexdashboard::flex_dashboard:
orientation: columns
vertical_layout: scroll

Thank you!
Max

Hello Max,

I've been looking for solution for this. Do you have any updates/solution besides reverse Shiny package to an older version?

Thanks,
Joyce