Information on the Minecraft Preview and Beta: 

• These work-in-progress versions can be unstable and may not be representative of final version quality
• Minecraft Preview is available on Xbox, Windows 10/11, and iOS devices. More information can be found at aka.ms/PreviewFAQ
• The beta is available on Android (Google Play). To join or leave the beta, see aka.ms/JoinMCBeta for detailed instructions 

Here’s a list of what is new in this week’s Minecraft Preview and Beta! As always, please search and report any bugs you may find at bugs.mojang.com and send us your feedback.

Features and Bug Fixes

Vanilla Parity

Spectator Mode (Experimental)

• Capes are no longer rendered while in Spectator Mode (MCPE-156929)
• Spectator players in Lava Cauldrons no longer display the burning animation (MCPE-160331)

Blocks

• Banners now spawn correctly in newly generated structures (MCPE-160696)

Gameplay

• Player textures and UI elements should no longer turn pink after playing for an extended period time on highly populated servers (MCPE-105487)
• Fixed issue where player would see inside of Top Snow when diving into it while wearing Elytra

Graphical

• Fixed a bug where the name tag background was slightly offset (MCPE-160254)

Performance and Stability

• Fixed a crash that could occur when resuming the game on Xbox

Items

• It is no longer possible to get an aged Sapling in the inventory by block-picking
• Item stacks now are merged together after assigned tick threshold

Mobile Controls

• Resolves issue in new Touch Controls where the sprint button could not be toggled when standing still
• Added logic to automatically toggle off sprint button when player releases the on-screen joystick

Mobs

• Reduced the Enderman’s teleport range to 32x32x32 to ensure that it cannot despawn itself by teleporting (MCPE-152268)
• Reverted a change to Drowned spawning, and they again spawn in Warm Ocean biomes to match the Java Edition

User Interface

• Added a missing settings button on packs in the updated Create New World screen
• Added a new disconnection error message – “Unable to connect, please restart your client”
• Added a paste button to the Command Block screen
• Updated splash texts
• Fix issue causing messages with non-unicode characters to have incorrect spacing

General

• Fixed a bug where deleting cloud synced worlds would not delete the cloud version of the world when the player deletes the world locally
• EDU Toggle: NPC names default to only being displayed while looking at them

Audio

• Fixed PS4 audio stuttering issues while framerate is low (MCPE-158902)

Technical Updates

General

• Fixed a crashing issue related to undyed Shulkers

Commands

• The ‘/execute at’ and ‘/execute as’ commands will now execute at the correct relative rotation (MCPE-156277)
• ‘/execute at @e run kill @e’ no longer crashes the game when there are items on the ground (MCPE-161029)
• Added chat output when entities are skipped by “/ride summon_ride no_ride_change” (MCPE-129486)

Experimental Technical Features

Actor Properties

• Add a content error when default or set_property expressions include side-effects, such as Molang variable assignment

GameTest Framework

• Memory Watchdog
  • script-watchdog-memory-warning- Produces a content log warning when the combined memory usage exceeds the given threshold (in megabytes). Setting this value to 0 disables the warning. (default = 100)
  • script-watchdog-memory-limit- Saves and shuts down the world when the combined memory usage exceeds the given threshold (in megabytes). Setting this value to 0 disables the limit. (default = 250)
• Player
  • setVelocity will now throw an exception when called on player types
• Watchdog
  • Increased slow code warning threshold from 2 ms to 6 ms
• Items
  • Renamed Items to ItemTypes
• ItemTypes
  • Added function getAll(): ItemTypeIterator- Returns an iterator of all available item types

source: https://feedback.minecraft.net/hc/en-us/articles/8653419896589