New Features and Bug Fixes in 1.20.5 Pre-Release

Experimental Features

Trial Chambers

• More consistently buried by terrain when found underground
• Remade 'Chamber 6' with variations, and renamed it to 'Assembly'
• Added a new trap dispenser style to chambers
• Fixed various broken jigsaw connections in the corridors
• Chamber Eruption:
  • Stopped Tuff Bricks from spawning in the air
  • Added more lights to quadrants

Ominous Trials

• Mobs that can wear equipment will now often spawn with enchanted weapons and armor
  • Armor enchantments include Protection IV, Projectile Protection IV and Fire Protection IV
  • Weapon enchantments include Sharpness I, Knockback I, Power I and Punch I
• Mobs that wear equipment no longer have a chance to drop their equipment on death
• Players are now chosen 50% of the time when an Ominous Trial Spawner chooses which entity to drop projectiles on top of
  • Projectiles now spawn more accurately above chosen entities

Weaving

• Now more consistently spawns 2-3 cobwebs on death
• Players are now affected by the movement buff through Cobwebs
  • Move through Cobweb with 50% of their normal speed instead of 25%

Infested

• Now has a 10% chance to spawn 1-2 Silverfish instead of 5%
• Silverfish will now spawn at the center of the entity's bounding box and fling out in the direction the entity is facing

Oozing

• Will only spawn slimes in a given 5x5x5 area up to the max entity cramming count

New Features in 1.20.5-pre1

Advancements

• Added the following advancements:
  • Isn't it Scute? -- Get Armadillo Scutes from an Armadillo using a Brush
  • Snip it! -- Remove Wolf Armor from a Wolf using Shears
  • Good as New -- Repair a damaged Wolf Armor using Armadillo Scutes
  • The Whole Pack -- Tame one of each Wolf variant

Changes in 1.20.5-pre1

• Added support for Viossa language

Technical Changes

• The Data Pack version is now 39

Data Pack Version 39

• Added new item sub-predicates and loot functions
• Added new terrain adaptation type for structures: encapsulate
  • Density will be added all around every piece of a structure
  • Ideal for structures that need to be entirely covered underground
• The page limit in Written Books has been removed
• The combination of max_stack_size and max_damage components is no longer allowed in commands and data pack definitions

Fixed bugs in 1.20.5 Pre-Release 1

• MC-165435 -- Can't trigger flying mode in creative while standing in the middle of 2x2 magma block bubble column
• MC-188497 -- AngerTime and AngryAt cannot be set on summon
• MC-207353 -- Ghast fireballs and wind charges can't be redirected in melee if the attack does 0 damage
• MC-263315 -- Attack Target of hoglins/zoglins can't be detected by /execute on target
• MC-264456 -- Entity targeted by frogs and axolotls can't be detected by /execute on target
• MC-265390 -- Forceload Command provides wrong output
• MC-267934 -- Sending ClientboundTransferPacket followed by disconnect just kicks the player
• MC-268000 -- The client crashes when using /give to give players a skull
• MC-268346 -- Jump can be used with generic.jump_strength set to 0 resulting in a speed boost
• MC-268947 -- Flying cannot be initiated reliably when the minecraft:generic.gravity attribute is increased
• MC-269191 -- Old villagers can't trade
• MC-269192 -- Breeze is not affected by the 'execute on target' command