I brought and downloaded the Festive Mashup 2016  last week, and had a seed  I was building in, and when the new update with the pandas and bamboo happened, the festive mashup was broken. When I went back in that world, leaves  are invisible, as well as torches, fire in fireplace, doors, and vines. I uninstalled the mashup and reinstalled and it's still broken. I went in the pre-made mashup and it's broken too, All of this was fine before the up date. As stated, I was building in a world with the festive blocks and all was showing up before the latest update.