"height limit for building is 256" (singleplayer)

[kin-fuyuki]

Version Information

Minecraft version: 1.12.2
Forge version: 2864
Other mods (if applicable):
3dSkinLayers-forge-mc1.12.2-1.2.0.jar
agricraft-2.12.0-1.12.2-b2.jar
AppleSkin-mc1.12-1.0.14.jar
architecturecraft-3.109.jar
BetterWithEverything-1.12-2.4.1.1.jar
buildcraft-all-8.0.0.jar
BuildingGadgets-2.8.4.jar
carryon-1.12.2-1.12.7.23.jar
'[CC]CubicChunksCompatibilityHelper-0.1.0.jar'
Chisel-MC1.12.2-1.0.2.45.jar
'Chisel Plus 1.0.6 (1.12.2).jar'
chiselsandbits-14.33.jar
'CNPC-Gecko-Addon-1.12.2-(05Jul20,03Feb22)-1.1.1.jar'
CodeChickenLib-1.12.2-3.2.3.358-universal.jar
CoFHCore-1.12.2-4.6.6.1-universal.jar
CoFHWorld-1.12.2-1.4.0.1-universal.jar
ComputerCraft1.80pr1.jar
corail_pillar-4.2.1-1.12.jar
corail_pillar_extension_chisel-4.0.0-1.12.jar
cpmsvcretro-1.2.0.jar
CreativeCore_v1.10.62_mc1.12.2.jar
CTM-MC1.12.2-1.0.2.31.jar
CubicChunks-1.12.2-0.0.1271.0-SNAPSHOT-all.jar
CustomMobSpawner-3.11.5.jar
'CustomNPCs_1.12.2-(05Jul20).jar'
CustomPlayerModels-1.12.2-0.6.27a.jar
davincisvessels-1.12-6.355-full.jar
device-mod-0.4.5-1.12.2.jar
DoggyTalents-1.12.2-1.15.1.6.jar
'DrZharks MoCreatures Mod-12.0.5.jar'
entityculling-1.12.2-1.6.3.jar
FluxNetworks-1.12.2-4.1.1.34.jar
Forgelin-1.8.4.jar
ForgeMultipart-1.12.2-2.6.2.83-universal.jar
furniture-6.3.2-1.12.2.jar
geckolib-forge-1.12.2-3.0.31.jar
grappling_hook_mod-1.12.2-v13.jar
guns-0.15.3-1.12.2.jar
ImmersiveEngineering-0.12-98.jar
infinitylib-1.12.1.jar
IronBackpacks-1.12.2-3.0.8-12.jar
JAFFA-7.63.1.jar
jei_1.12.2-4.16.1.1013.jar
journeymap-1.12.2-5.7.1p3.jar
just-enough-harvestcraft-1.12.2-1.7.2.jar
lan-properties_forge-1.0.0+1.12-1.12.2.jar
littleopener-1.0.1.jar
LittleTiles_v1.5.87_mc1.12.2.jar
lt3dimporter-0.7.jar
Mantle-1.12-1.3.3.55.jar
mcjtylib-1.12-3.5.4.jar
MCT-ImmersiveTechnology-1.12.2-1.10.198-release.jar
mcw-bridges-1.0.6b-mc1.12.2.jar
mcw-doors-1.0.3-mc1.12.2.jar
mcw-fences-1.0.0-mc1.12.2.jar
mcwfuncfurn-1.2.1.jar
mcw-furniture-1.0.1-mc1.12.2beta.jar
mcw-lights-1.0.6-mc1.12.2forge.jar
mcw-paths-1.0.2forge-mc1.12.2.jar
mcw-roofs-1.0.2-mc1.12.2.jar
mcw-trapdoors-1.0.4-mc1.12.2.jar
mcw-windows-1.0.0-mc1.12.2.jar
'!mixinbooter-10.7.jar'
MJRLegendsLib-1.12.2-1.2.1.jar
MouseTweaks-2.10.1-mc1.12.2.jar
movingworld-1.12-6.353-full.jar
Mr_Crayfish_Vehicle_Spawner_1.3.jar
MrTJPCore-1.12.2-2.1.4.43-universal.jar
multibeds-1.12.0-1.4.7.jar
Ne-Carpenters-Blocks-0.1.2.jar
NotEnoughIDs-1.5.4.4.jar
obfuscate-0.4.2-1.12.2.jar
OpenComputers-MC1.12.2-1.8.9a+8ca336f.jar
"Pam's+BreadCraft+1.12.2-1.1.2.jar"
pamscookables-1.1.jar
"Pam's HarvestCraft 1.12.2zg.jar"
Patchouli-1.0-23.6.jar
performant-1.11.jar
Plant-Mega-Pack-Mod-1.12.2.jar
ProjectRed-1.12.2-4.9.4.120-Base.jar
ProjectRed-1.12.2-4.9.4.120-compat.jar
ProjectRed-1.12.2-4.9.4.120-fabrication.jar
ProjectRed-1.12.2-4.9.4.120-integration.jar
ProjectRed-1.12.2-4.9.4.120-mechanical.jar
railcraft-12.1.0-beta-8.jar
RedstoneFlux-1.12-2.1.1.1-universal.jar
"Reeves'sFurnitureMod-3.1.1-1.12.2.jar"
RFTDimTweak-1.12.2-1.1b.jar
rftools-1.12-7.73.jar
rftoolsctrl-1.12-2.0.2.jar
rftoolsdim-1.12-5.71.jar
rftoolspower-1.12-1.2.0.jar
shetiphiancore-1.12.0-3.5.9.jar
SimpleLogic-Gates-0.5.6.1.jar
SimpleLogic-Wires-0.5.6.3.jar
Soviet+Era+0.6.jar
stevekung-lib-mc1.12.2-v1.4.0.jar
supermartijn642configlib-1.1.8-forge-mc1.12.jar
_supermartijn642corelib-1.1.21-forge-mc1.12.jar
TConstruct-1.12.2-2.13.0.183.jar
ThermalCultivation-1.12.2-0.3.6.1-universal.jar
ThermalDynamics-1.12.2-2.5.6.1-universal.jar
ThermalExpansion-1.12.2-5.5.7.1-universal.jar
ThermalFoundation-1.12.2-2.6.7.1-universal.jar
ThermalInnovation-1.12.2-0.3.6.1-universal.jar
TinkerToolLeveling-1.12.2-1.1.0.jar
tombstone-1.12.2-4.7.6.jar
voicechat-forge-1.12.2-2.6.20.jar
xercapaint-1.12.2-1.3.jar
XL-Food-Mod-1.12.2-1.9.2.jar

Steps to reproduce:

1. create new world in singleplayer
2. try to build above 256
3. reload world and try again

Expected Behavior:
can build above 256

Actual Behavior:
"height limit for building is 256" shows, i can plant trees with a sapling on y=256, and if i break something above 256 while standing above it, it is an invisible block i "fall through" and get pushed up again just like how it happens when you break a block in a server with lag.

if i reload the world, the block i "broke" is "back"

[Niko-sk2x]

Note: this is a completely unrelated issue but ForgeMultiPart and any mod that requires it like ProjectRed is known to be incompatible - it will appear to work but break in silent ways, possibly crashing the game or corrupting the world

[kin-fuyuki]

well one thing that worked was downgrading my forge version from 2864 to 2859

maybe theres a forge incompatibility issue there