The jump bar's progress sprite is improperly scaled

Loot tables stopped supporting SNBT as entity data

Occasional sound crash on resource pack reload

entity_data item component detection is broken in resource packs

Acceleration power of fireballs and wind charges gets halved when they are redirected by explosions

Second armor layer is still not rendering properly on all pieces

Nether ambient sounds continue playing after leaving the Nether

Interacting with items with certain components in the inventory causes a crash

Players can freeze while standing in powder snow despite the game being paused

The player can drown while the game is paused

Force upgrading does not write new DataVersion to converted data

Axes disable shields even when the shield does not block the attack

Sniffers now show the digging animation instead of the walking animation

All naturally spawned zombie villagers are professionless since 25w16a

The name plates of entities with an empty custom name are now rendered incorrectly

Text no longer renders in a consistent order across different fonts

Text shadow from underlined text overlaps the text below it in chat messages

Bold text is rendered differently than in previous versions

Equipment and sleeping pos data cannot be loaded in 1.21.4, but can be loaded in 1.21.5 to bees spawned from bee nest and bee hive

All non-default jukebox_playable components are deleted from existing items when updating past 1.21.4

Transformed entities do not retain their custom_data component

NoAI:1b mobs cannot be ridden in 1.21.5+

ClientboundLevelChunkPacketData buffer size is too big

Reloading a professionless zombie villager causes it to gain random profession clothing

fireball and small_fireball can no longer have their Owner, HasBeenShot, or LeftOwner fields modified

"Received missed or reordered chat message from server" string doesn't make logical sense

The Particle.color field in area effect clouds is read-only

Some game events can crash the game when attempting to create vibration resonance with an amethyst block

DeathLootTable field is incorrectly named DeathLoothTable

Shields can block some environmental damage sources

Monster spawner and trial spawner tooltip no longer displays the "Interact with Spawn Egg" hint

Shears no longer consume durability when used on insta-mined blocks

crafting_transmute recipes don't give an output if the output stack has the same count as the stack in the crafting grid

The mule saddle texture is missing in the Programmer Art resource pack

Modifying command data storage throws an error

Tooltip description for saddle attribute modifier slot is not translated

Component blocks_attacks accept disabled_sound instead of disable_sound

provides_banner_pattern component does not use hash prefix

Shields no longer consume durability when blocking attacks

Shield blocking animation no longer plays when blocking an attack

Display entities use interpolation duration value for teleport duration

hide_additional_tooltip no longer hides author and generation on written books

Baby zombified piglin helmet clipping

CustomName cannot be removed from block entities

Baby polar bears are too small

Parrots with non-player owner UUID cause crash upon spawning

crafting_transmute recipes don't give output if the resulting item has the same ID as the input item