Minecraft wiki entry for Development_versions, associated text: MC-63340 – Sleeping always resets time until rain.
MC-170551 – Foxes can't spawn on podzol or coarse dirt.
MC-187716 – Nether biome surface builder types incorrectly assume the world height is 128 blocks.
MC-190285 – "bedrock_roof_position" tag number does not represent height, but height modifier.
MC-200494 – In mineshafts, torches can generate attached to blocks other than the wooden supports.
MC-216432 – Mineshafts can generate with light but without any torches.
MC-216561 – Torches not spawning in abandoned mineshafts under Y=0.
MC-238877 – Deep ocean and ocean are not needed for the "Adventuring Time" advancement.
MC-238966 – Old growth spruce taiga and old growth birch forest aren't a part of the "Adventuring Time" advancement.
MC-238968 – Windswept gravelly hills and windswept savanna aren't a part of the "Adventuring Time" advancement.