A recent change made it possible for more types of mobs to spawn inside Nether Portals, which caused them to instantly change dimensions after spawning. We will not be making any further changes to this before the release of 1.19, but our intent for the future is to prevent most mobs from spawning in Nether Portals and the ones that do will not immediately travel through the portal. Expect to see these changes in a coming version.
Changes in 1.19 Pre-release 2
If the Warden is stuck in a liquid, it will angrily despawn instead of digging
Reverted using generic equip sound when equipping blocks in the head slot
Technical Changes in 1.19 Pre-release 2
Added game event teleport with a vibration frequency of 5
Fixed bugs in 1.19 Pre-release 2
MC-186148 "death.attack.witherSkull.item" displays raw translation string (is untranslated)
MC-186851 "death.attack.sting.item" displays raw translation string (is untranslated)
MC-250956 Baby goats with horns lose their horns when fed
MC-251314 Goats loaded from older worlds lose their horns
MC-251336 Darkness fog flashes at high duration values
MC-251412 Warden afflicting Darkness to players in the same team
MC-251500 Wardens ignore PersistenceRequired and dig away
MC-251601 Darkness rendering incorrectly when reloading the game
MC-251639 Warden emerging particles don't match up with block they emerge on the entire way
MC-251646 "death.attack.sonic_boom.item" displays raw translation string (is untranslated)
MC-251670 Villager sometimes won't refill their stock
MC-251675 Mesa Mineshafts no longer generate with /place command outside of badlands biomes despite saying the structure has been generated successfully
MC-251736 Reflected ghast fireball cannot hit the ghast
MC-251824 Wardens aren't angered by being hit with damageless projectiles
MC-251854 "It Spreads" advancement can be granted when killing a mob that does not give experience
MC-251859 Gear equipping sound plays every time armor/elytra durability changes while equipped
MC-251860 The minecraft:item.armor.equip_generic sound is produced when giving items to allays
MC-251862 Shift clicking the destroy item button in the creative inventory creates a vibration when there is nothing in your equipment slots
MC-251864 The minecraft:item.armor.equip_generic sound is produced when filling water buckets with fish, axolotls, or tadpoles
MC-251871 The minecraft:item.armor.equip_generic sound is produced and can only be heard by other players when switching items between hands
MC-251876 Villagers produce armor equipping sound when previewing armor
MC-251889 io.netty.handler.codec.EncoderException when evaluating too many entity selectors in chat preview
MC-251890 run_command click events send value as command instead of chat message
MC-251915 Milking cows, mooshrooms and goats plays gear equipping sound
MC-251916 Eating food items that return empty containers plays gear equipping sound
MC-251919 Equipping a player head, skull or carved pumpkin displays the generic "Gear equips" subtitle
MC-251920 Taking a plant from a pot plays the gear equipping sound and subtitle
MC-251921 Equipping horse armor onto a horse plays the "Gear equips" sound
MC-251922 "Gear equips" sound plays when equipping or removing a saddle from a horse wearing horse armor
MC-251924 Gear equipping sounds and subtitles are played when foxes pick up any item
MC-251925 Gear equipping sounds and subtitles are played when dolphins throw around items
MC-251927 Gear equipping sounds and subtitles are played when CanPickUpLoot mobs pick up items
MC-251928 Gear equips sound plays when filling a single bottle with honey
MC-251929 Gear equips sound plays when filling a single bottle with water from a water source