We're now releasing pre-release 5 for Minecraft 1.18. This pre-release contains more bug fixes and a tweak to new cave generation under existing chunks.

Changes in 1.18 Pre-release 5

If there is any bedrock at height 0 in a chunk, new world generation will happen under any non-air block at height 0 in that chunk

Fixed Bugs in 1.18 Pre-release 5

MC-138118 Parrot wing texture is reversed on the bottom
MC-148422 Stripped dark oak log side texture is too bright
MC-150567 Dark oak log top texture bark ring not updated
MC-162038 Pillagers have no hood texture
MC-162803 Lily Pad mirrors texture when placed
MC-170557 Spruce door top/bottom has the incorrect texture
MC-176309 Illusioner has a few misplaced pixels left in their texture
MC-176824 Red glass and outline of blue glass are slightly more opaque.
MC-176833 Anvil GUI hammer uses an outdated iron pallet
MC-177664 Sound system warning messages are spamming the system log
MC-180398 Too many sounds causes client to stall, limit can be easily reached with rabbits
MC-194822 Glass pane top texture has not changed with the Texture Update
MC-194950 Cactus in potted cactus is vertically squished
MC-198007 Villages replace ice with path blocks instead of wood
MC-199662 Extra pixels in cocoa pod textures as of Texture Update
MC-200046 Cartography table planks texture is incorrect/slightly outdated
MC-200137 Lectern base plate texture still uses the old planks texture
MC-200956 Beetroot seeds texture is not vertically centered
MC-200957 Melon seeds texture is not vertically centered
MC-202910 Inconsistent highlight color on armor
MC-204901 Side texture for dirt paths hasn't been updated with the texture update
MC-221172 Warped and Crimson Stems use different top texture from Bedrock Edition
MC-222154 Cave vines can generate hanging on pointed dripstone
MC-222763 Armor stands use the old smooth stone slab texture
MC-225553 Oak and iron doors have a line in their textures
MC-226711 Carrot crop texture has an incorrect pixel
MC-227258 Flowering Azalea Leaves are in both #minecraft:mineable/hoe and #minecraft:mineable/axe tags, while regular Azalea Leaves (and all other leaves) are only in #minecraft:mineable/hoe
MC-228900 Cave vines can generate floating (Recurrence of MC-218817)
MC-229977 Breaking blocks with pistons on the east/west direction causes significant lag
MC-231272 Cave vines can sometimes generate hanging on cobwebs
MC-231818 You can no longer use the up or down arrow to navigate between servers in the multiplayer menu
MC-233883 The hide and show messages buttons in the social interactions menu display their hover text regardless of the position of the cursor
MC-234039 The back of wild axolotls are off-centered
MC-235567 Clusters of dripstone (stalagmites) tend to generate abnormally frequent with thickness "tip" on tall caves
MC-236723 The Floating Islands preset does not seem to be generating correctly
MC-237500 Azalea trees can generate on top of huge mushrooms, trees & bamboo
MC-238360 Rooted dirt cannot replace terracotta
MC-238529 Azalea trees can fail to generate
MC-238892 Rooted dirt doesn't replace red sand
MC-239128 Sweet berry bushes generate extremely rare in comparison with 1.17.1
MC-239237 Azalea trees can be generated on icebergs
MC-239489 Melons generate rarely in jungle biomes
MC-239847 Chunk blending occasionally produces sharp chunk border edges
MC-241256 Some feature configs still expect a configured feature instead of a placed feature
MC-241278 Azalea trees are no longer generating
MC-241539 Stone generates in the side of hoodoos
MC-241566 Mossy cobblestone boulders generate in a grid pattern in old-growth spruce taigas
MC-241588 Cave vines can sometimes generate hanging on water
MC-241672 Mobs don't panic when burning if standing on blocks placed above water
MC-241728 Converting world to 1.18 pre-release 2 generates new caves in too many places
MC-241747 Inconsistent Colors in grindstone gui
MC-241784 Some sliders in options menu do not work properly
MC-241800 Cannot change numbers for gamerules on world creation
MC-241847 Floating stone platform doesn't generate in void superflat world preset
MC-241933 Spore blossoms, cave vines, and pointed dripstones generate indented into the cave surface

Minecraft 1.18 Pre-Release 5