Minecraft wiki entry for Development_versions, associated text: MC-4921 – Sounds (e.g. mobs/portals/water) don't immediately fade.
MC-10633 – Players can't look through ice or stained glass if they have it in their hand, but they can if it is placed.
MC-19483 – Sounds playing after leaving world.
MC-26660 – Constant minecart sound.
MC-28478 – Successful hit sound effect does not match the sound in the assets sound folder.