Minecraft wiki entry for Development_versions, associated text: Changed mob population cap to only count mobs with spawn rules (MCPE-54378)
Mob despawn range is now tied to Simulation Range (MCPE-65570)
Fixed an issue that sometimes caused Villagers to not link up to job sites correctly in multiplayer worlds (MCPE-49580)
Fixed an issue that could cause overlapping Villages to be repeatedly created and destroyed
Parity: Water now freezes from the edges, matching the Java Edition
Fall damage protection will now work as expected from tall heights (MCPE-74561)
Flying too fast with elytra into an unloaded chunk will no longer cause death by kinetic energy (MCPE-55671)
Fixed ravines not being positioned correctly compared to older versions
Fixed players being able to duplicate items by closing the title while on the respawn menu
Dropping items enchanted with Vanishing now works correctly (MCPE-65649)
Players can now only enchant one compass at a time, using an anvil in Survival
Fixed an issue that sometimes caused Redstone torches to get stuck on or off when reloading a world (MCPE-48054)
Fixed an issue that could cause Kelp to stop growing too soon - Kelp now checks the block in the ticking queue when attempting to add itself (MCPE-57330)
Feather Falling and Protection enchantments now give the correct player damage protection (MCPE-74561)