After the latest beta update (as of 2/23/19) when you join someone else's world banners that have previously been placed appear blank and when you have them in an open inventory it crashes(ex. banner in chest I open chest game crash) the game this includes chests unsure about (enderchests and shulker boxes) this bug doesn't seem to affect the host in any way and it is unknown whether a 3rd or 4th player would be affected