Minecraft wiki entry for Development_versions, associated text: Axolotl spawns only when there is stone up to 10 blocks under them, and not in bubble columns.
Armor stands now drop equipped items when destroyed by fire or lava (MCPE-94603).
Limited the maximum number of phantom mobs that can spawn (MCPE-106557).
Goats now play their "impact 3" sound (MCPE-127757).