Describe the Bug
Unlike #39, I'm not experiencing a crash, but the behavior of chain collisions and their rendering in the sub-level state is broken.
Reproduction Steps
Watch the video below
Expected Result
The chain is rendered as before, and it—along with its collision—moves together with the entire sub-level.
Screenshots and Videos
Minecraft.2026.07.12.-.18.47.17.07.2.mp4
Game Version
1.21.1
Mod Version
2.2.3
Mod Loader
NeoForge
Loader Version
21.1.235
Other Mods / Modpack
Modlist
Integrated Dungeons and Structures
(DEBUG TOOL) packdev_toolkit-neoforge-1.21.1-1.2.0.jar
[EMF] Entity Model Features
[ETF] Entity Texture Features
A Good Place
Accurate Block Placement Reborn
Advancement Border
Almanac
Alternate Current
AmbientSounds
Amendments
Another Furniture
Antique Atlas 4
API-cupboard-1.21.1-3.8.jar
API-framework-neoforge-1.21.1-0.13.11.jar
Architectury API
Armor Trim Item Fix
Async Logger
AsyncParticles
AttributeFix
AutoModpack
backpacked-neoforge-1.21.1-3.0.5.jar
Backpacked: Shells
Backpacked: World of Color
Bad Horse Fix
BaguetteLib
Balm
Better Combat
Better Combat Particle
Better Days
Better ModList
Better Respawn
Better Saved Hotbars
BetterF3
Big Brain
Blueprint
Boat Break Fix
Bookshelf
Calm down, dog!
Camera Overhaul
Cerulean
Chat Animation [Smooth Chat]
Chat Heads
Cherished Worlds
Chunk Activity Tracker
Chunky
Cinematic Respawn
Client Tweaks
CLIENT-SomeAddon-farsight-1.21.1-5.1.jar
CLIENT-SomeAddon-PERF-clientcrafting-1.21-2.1.jar
CLIENT-SomeAddon-PERF-gpumemleakfix-1.21-1.8.jar
CLIENT-visual_keybinder-1.21.1-0.1.13-neoforge.jar
CLIENT-worldplaytime-1.2.2-1.21-NEOFORGE.jar
Cloth Config API
Clumps
Collective
Combat Roll
Companion 🐕
Configurable
Configuration
Connector Extras
Controlling
Cool Rain Reforged
CoroUtil
cosmeticarmorreworked-1.21.1-v1-neoforge.jar
Crash Assistant
CrashExploitFixer
Create
Create Aeronautics
Create: Compatible Storage
Create: Copycats+
Create: Framed
Create: Nowheel
Create: Power Grid
CreateBetterFps
CreativeCore
Creeper Overhaul
Critters and Companions
Curios API
Curious Armor Stands
Cursors Extended
Detected setBlock Be Gone
Diagonal Fences
Diagonal Walls
Diagonal Windows
Dismount Entity
Distracting Trims
Does It Tick?
Doped Horses - Faster, Enchantable & Configurable horses
Drippy Loading Screen
Durability Tooltip
Dynamic Crosshair
Easy Anvils
Ecologics
EfficientHashing
End Remastered
Ender Dragon Destroys End Island
Enderman Overhaul
Entity Culling
Euphoria Patches
Explosive Enhancement: Reforged
Fabric Language Kotlin
Fancy Toasts | Better Advancements
Fancy World Animations
FancyMenu
Fast IP Ping
Fast Item Frames
Fast Noise
Fast Paintings
Faster Random
FastQuit
FerriteCore
Field Guide
Fish No Stuck
Flimsy Torches
Forge Config API Port
Forgified Fabric API
Fragmentum
Fuel Goes Here
Fzzy Config
Geckolib
GEN-morevillagers-neoforge-1.21.1-6.0.0.jar
Get It Together, Drops!
Gilded Sherds
Gliders
Golem Spawn Animation
Guard Villagers
Heart Crystals
Heartstone
Hey Berry! SHUT UP
HORSE-horseinboat-neoforge-1.1.6.jar
Horseman
I'm Fast
iChunUtil
Idwtialsimmoedm
Immersive Enchanting
Immersive Gateways
Immersive Horse Riding
Immersive Hotbar
Immersive Optimization
Immersive Overlays
Immersive UI
In Control!
Integrated API
Integrated Stronghold
Integrated Villages
Inventory Essentials
Iris & Oculus Search
Iris Shaders
Iris/Oculus Shader Folder
Item Descriptions
ItemPhysic Lite
Jade Addons (Neo/Forge)
Jade 🔍
JEI Trim Hider
Just Enough Breeding (JEBr)
Just Enough Effect Descriptions (JEED)
Just Enough Items (JEI)
Just Enough Professions (JEP)
Kiwi 🥝
Konkrete
Kotlin for Forge
Krypton Reno
KubeJS
Leaf Me Alone
Let Me Despawn
Lithium
Load My F***ing Tags
Loading Backgrounds
Loot Journal: Pickup Notifier
Lucky's Wardrobe
M.R.U
Map Distance Fix
Max Health Fix
McQoy
Melody
MidnightLib
Mine Menu
MixinTrace Reforged
Model Gap Fix
ModernFix
Moonlight Lib
Mouse Tweaks
Multiplayer Server Pause
Name Pain
Necronomicon API
neo_21.1_HarderSpawners_CC-0.30.6.jar
Neruina - Ticking Entity Fixer
NetherPortalFix
No Chat Reports
NoDurabilityLost
Not Enough Animations
Not Enough Recipe Book [NERB]
Notable Bubble Text (NBT)
Obscure Tooltips
ObsidianUI
Oh My Sherd
One Enough Block
One Enough Item
One Enough Lib
Optimized Block Entities
Overflowing Bars
Packed Packs
Packet Fixer
Particle Core
PERF-alltheleaks-1.1.9+1.21.1-neoforge.jar
PERF-jasione-1.0.3+1.21.1-neoforge.jar
Persistent Creative Inventory
Personality
Ping Wheel
Platform
Player Locator Plus
playerAnimator
Polymorph
Ponder for KubeJS
Portfolio
Presence Footsteps
Prickle
ProbeJS
Progress Peek
Pufferfish's Biome Dither
Puzzles Lib
Quark
QuarkPonders
quick pack
quickstack-neoforge-1.21.1-1.jar
Reconnectible Chains
Reese's Sodium Options
Reliable Advancements
Reliable Recipes
Reliable Remover
Reliable Replacer
Resource Bar API
Resource Pack Overrides
Resourceful Config
Resourceful Lib
Rhino
Rotten Creatures
Sable
Sawmill
Scholar
Screenshot Viewer
Searchables
Second Chance (Forge)
SelectiveBounds
ServerCore
SERVERSIDE-FIX-deuf-1.21.1-1.3.jar
SERVERSIDE-libertyvillagers-1.21.1-NeoForge-1.0.2.jar
SERVERSIDE-neo21.1_regrowth_CC-21.34.7.jar
SERVERSIDE-SomeAddon-armordamagescale-1.21.1-3.5.jar
SERVERSIDE-SomeAddon-dragonfight-1.21-4.7.jar
SERVERSIDE-SomeAddon-leaky-1.21-2.4.jar
SERVERSIDE-SomeAddon-logprot-1.21-3.5.jar
SERVERSIDE-SomeAddon-PERF-chunksending-1.21-2.9.jar
SERVERSIDE-SomeAddon-PERF-fastasyncworldsave-1.21-2.6.jar
SERVERSIDE-SomeAddon-PERF-limitedchunks-1.21-4.1.jar
SERVERSIDE-SomeAddon-PERF-structureessentials-1.21.1-5.0.jar
ShatterLib | OctoLib
Shield Expansion
Shield Sounds Backport
Shoulder Surfing Reloaded
Simple Backups
Simple Netherite Horse Armor
Simple Snowy Fix (Forge / Fabric)
Sinytra Connector
Skeleton Horse Spawn
Skin Restorer
Smooth Scrolling Refurbished
Smooth Swapping
Sodium
Sodium Dynamic Lights
Sodium Extras
SomeAddon-evolution-1.21.1-1.8.jar
SomeAddon-PERF-connectivity-1.21.1-7.6.jar
SomeAddon-PERF-recipeessentials-1.21-4.0.jar
SomeAddon-PERF-smoothmovement-1.21.1-2.7.jar
SomeAddon-SOUND-biomemusic-1.21.1-4.1.jar
Sooty Chimneys
Sound Physics Remastered
Sounds
spark
Sparse Structures
Spyglass Improvements
Squid No Glitch
Stamina Attributes
Structure Layout Optimizer
Stylish Effects
Subtle Effects
SuperFancyClouds: Refabricated
SuperMartijn642's Config Lib
Supplementaries
Supplementaries Squared
Surveyor Map Framework
TPS Detective
Traveler's Titles
Tree Physics
TxniLib
Useful Spyglass
Valhelsia Core
Valhelsia Furniture
Vanilla Backport
Variants&Ventures
Visual Workbench
Visuality
Wakes
Wilder Flowers
Wither Spawn Animation
YDM's Weapon Master
YetAnotherConfigLib (YACL)
Yori3o's Grappling Hooks
YUNG's API
YUNG's Better Dungeons
YUNG's Better End Island
YUNG's Better Jungle Temples
YUNG's Better Mineshafts
YUNG's Better Nether Fortresses
Zeta
Zombie Horse Spawn
Additional Context
Is it possible to create a compatibility patch for Sable where chain collisions could also have a sub-level state, while still rendering as before?