Minecraft wiki entry for Development_versions, associated text: MC-73 – Green arrow bug on maps in frames.
MC-1528 – Maps in item frames' markers aren't persistent.
MC-96998 – End Cities / Woodland Mansions don't generate completely when interrupting generation
MC-112801 – Players on the death screen still cause spawners to spawn.
MC-122939 – Statistics for mining banners and beds never increase.
MC-128547 – Minecraft keeps previously used World in memory if the player has hit any entity in that world.