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Elevator contraption glitching when used on landed simulated object on server #673
Description
Description
Playing on a server, tried making an elevator contraption for my airship and whenever I'd go up it, I'd briefly teleport about 100 blocks above my current location, return and fall through as shown in the video below.
Minecraft.NeoForge_.1.21.1.-.Multiplayer.3rd-party.Server.2026-04-30.09-18-05.mp4
The server is updated to
Sable 1.2.1
Simulated 1.2.1
As well as the client
The ship was tilted fowards slightly and was on the floor when recreating the bug, tried recreating on a client world and it didn't occur.
The elevator pulley is operating at 64 RPM, the contraption is 5x3x3
There is also another simulated object inside of the airship
Server logs:
Game Log
N/A nothing on client but the images at the bottom of the description are from the server when the bug occured.
Debug Information
Client Info
Create:
Mod Version: 6.0.10
Mod Git Commit: ac0c444d9828da3453ae8cc65338e8de063286fb
Ponder Version: 1.0.82+mc1.21.1
NeoForge Version: 21.1.225
Minecraft Version: 1.21.1
Graphics:
Flywheel Version: 1.0.6
Flywheel Backend: flywheel:indirect
OpenGL Renderer: AMD Radeon RX 6700 XT
OpenGL Version: 4.6.0 Core Profile Context 26.3.1.260303
Graphics Mode: fancy
PojavLauncher Detected: false
System Information:
Operating System: Windows 10 (amd64) version 10.0
Java Version: 21.0.10, Azul Systems, Inc.
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx16384M -XX:+UseZGC
Memory: 2155872256 bytes (2056 MiB) / 7065305088 bytes (6738 MiB) up to 17179869184 bytes (16384 MiB)
Total Memory: 4917821440 bytes (4690 MiB) / 7065305088 bytes (6738 MiB)
CPU: AMD Ryzen 9 5950X 16-Core Processor @ 3.40 GHz; 16 cores / 32 threads on 1 socket(s)
Graphics cards: none
Other Mods:
HT's TreeChop: 0.19.3
Forgified Fabric Renderer API (v1): 3.4.1+9125b6dc19
Easy Anvils: 21.1.0
Forgified Fabric Item API (v1): 11.2.0+0c57911319
Forgified Fabric Rendering Fluids (v1): 3.1.6+a51883b219
Create Aeronautics: 1.2.1
Sound Physics Remastered: 1.21.1-1.5.1
Ritchie's Projectile Library: 2.1.2
Forgified Fabric Convention Tags: 2.1.5+7f945d5b19
Xaero's World Map: 1.40.11
Controlling: 19.0.5
Forgified Fabric Command API (v2): 2.2.28+36d727be19
Forgified Fabric BlockView API (v2): 1.0.11+e9036fd419
Forgified Fabric Convention Tags (v2): 2.11.1+87e5848019
Forgified Fabric Data Attachment API (v1): 1.4.5+26d408aa19
LambDynamicLights: 4.8.8+1.21.1
Iris: 1.8.12-snapshot+mc1.21.1-local
Cool Rain: 1.0.1
Veil: 4.0.0
Create Simulated: 1.2.1
Create Diesel Generators: 1.21.1-1.3.11
Forgified Fabric Screen API (v1): 2.0.25+0ae1214819
Carry On: 2.2.4
Sinytra Connector: 2.0.0-beta.14+1.21.1
Create: Interiors: 0.6.1
Cloth Config v15 API: 15.0.128
Better Clouds: 1.7.20-alpha+1.21.1-neoforge.rev.4c611d9
Forgified Fabric API: 0.116.7+2.2.4+1.21.1
Pride Lib: 1.2.4+1.21.1
Forgified Fabric Content Registries (v0): 8.0.19+5e0d320019
Farmer's Delight: 1.3.0
Entity Model Features: 3.2.2
Entity Texture Features: 7.1
Forgified Fabric Game Rule API (v1): 1.0.53+36d727be19
Forgified Fabric API Lookup API (v1): 1.6.71+c290471319
Voxy: 0.2.14-alpha
Spyglass Improvements: 1.5.7
Searchables: 1.0.2
Forgified Fabric Entity Events (v1): 1.8.0+5ede667619
LambDynamicLights (Runtime): 4.8.8+1.21.1
Forgified Fabric Loot API (v2): 3.0.15+a3ee712d19
Forgified Fabric Loot API (v3): 1.0.3+333dfad919
TRansition: 1.0.17
Forgified Fabric Rendering Data Attachment (v1): 0.3.49+73761d2e19
M.R.U: 1.0.19+LTS+1.21.1+neoforge
Forgified Fabric Networking API (v1): 4.3.0+30a980d919
Forgified Fabric Lifecycle Events (v1): 2.6.0+e40d8add19
Forgified Fabric Key Binding API (v1): 1.0.47+62cc7ce119
Forgified Fabric Client Tags: 1.1.15+e053909619
Forgified Fabric Transfer API (v1): 5.4.3+a25cb45619
Doris' Delight: 1.0.0
Create Big Cannons: 5.11.3
Keep Some Inventory: 1-v2.0.1
Create: Copycats+: 3.0.4+mc.1.21.1-neoforge
Easy Magic: 21.1.4
Forgified Fabric Model Loading API (v1): 2.1.0+6e8f52c719
Just Enough Items: 19.27.0.340
Particle Rain: 4.0.0-beta.9
Create Aeronautics: 1.2.1
XaeroLib: 1.1.0
Forgified Fabric Screen Handler API (v1): 1.3.90+8dbc56dd19
Forgified Fabric Resource Loader (v0): 1.3.1+4ea8954419
TRender: 1.0.12
Forgified Fabric Rendering (v1): 5.1.0+1a09bd5a19
No Chat Restrictions: 1.21.11-v1.0.0
Forgified Fabric Renderer - Indigo: 1.7.1+9125b6dc19
Nature's Compass: 1.21.1-3.4.0-neoforge
Disable Dimensions: 0.7.0
Sodium: 0.6.13+mc1.21.1
Forgified Fabric Particles (v1): 4.0.2+824f924c19
Simple Voice Chat API: 2.6.13
3d-Skin-Layers: 1.11.1
Forgified Fabric Transitive Access Wideners (v1): 6.2.0+6c854b6f19
Create Offroad: 1.2.1
Simple Voice Chat: 1.21.1-2.6.16
Forgified Fabric API Base: 0.4.42+d1308ded19
Forgified Fabric BlockRenderLayer Registration (v1): 1.1.52+c290471319
Forgified Fabric Block API (v1): 1.1.0+b0c22bb819
Sable: 1.2.1
Forgified Fabric Resource Conditions API (v1): 4.3.0+5bdd099819
Sounds: 2.4.22+lts
Sable Companion: 1.6.0
Forgified Fabric Item Group API (v1): 4.1.7+e324903319
Forgified Fabric Game Test API (v1): 2.0.5+29f188ce19
SpruceUI: 6.2.5+1.21.1
Freecam: 1.3.0+mc1.21
Yumi Minecraft Libraries: Foundation: 1.0.0-beta.1+1.21.1
Forgified Fabric Biome API (v1): 13.0.31+1e62d33c19
Forgified Fabric Registry Sync (v0): 5.3.1+f9aace1619
Continuity: 3.0.0_1.21.neoforge
LambDynamicLights (API): 4.8.8+1.21.1
AppleSkin: 3.0.9+mc1.21
Forgified Fabric Recipe API (v1): 5.0.15+59440bcc19
Forgified Fabric Object Builder API (v1): 15.2.1+cc242efd19
YetAnotherConfigLib: 3.8.2+1.21.1-neoforge
Puzzles Lib: 21.1.39
Create: Power Loader: 2.0.4-mc1.21.1
Forgified Fabric Sound API (v1): 1.0.23+10b84f8419
Forgified Fabric Message API (v1): 6.0.14+6a754fce19
Forgified Fabric Data Generation API (v1): 20.2.34+a4c3605619
Forgified Fabric API (dummy): 0.116.7+2.2.4+1.21.1
Forgified Fabric Events Interaction (v0): 0.7.13+86e0887119
Server Info
Create:
Mod Version: 6.0.10
Mod Git Commit: ac0c444d9828da3453ae8cc65338e8de063286fb
Ponder Version: 1.0.82+mc1.21.1
NeoForge Version: 21.1.226
Minecraft Version: 1.21.1
System Information:
Operating System: Linux (amd64) version 6.8.0-110-generic
Java Version: 25.0.2, Ubuntu
JVM Flags: 1 total; -Xmx16G
Memory: 791387784 bytes (754 MiB) / 3724541952 bytes (3552 MiB) up to 17179869184 bytes (16384 MiB)
Total Memory: 2940755560 bytes (2804 MiB) / 3724541952 bytes (3552 MiB)
CPU: AMD EPYC-Milan Processor @ 2.00 GHz; 2 cores / 4 threads on 1 socket(s)
Graphics cards: none
Other Mods:
Farmer's Delight: 1.3.0
HT's TreeChop: 0.19.3
Doris' Delight: 1.0.0
Simple Voice Chat: 1.21.1-2.6.16
Create Big Cannons: 5.11.3
Easy Anvils: 21.1.0
Keep Some Inventory: 1-v2.0.1
Create: Copycats+: 3.0.4+mc.1.21.1-neoforge
Easy Magic: 21.1.4
Just Enough Items: 19.27.0.340
Sable: 1.2.1
Create Aeronautics: 1.2.1
Create Aeronautics: 1.2.1
Sable Companion: 1.6.0
Ritchie's Projectile Library: 2.1.2
Nature's Compass: 1.21.1-3.4.0-neoforge
Disable Dimensions: 0.7.0
Veil: 4.0.0
Create Simulated: 1.2.1
Create Diesel Generators: 1.21.1-1.3.11
Puzzles Lib: 21.1.39
Create: Power Loader: 2.0.4-mc1.21.1
Carry On: 2.2.4
Simple Voice Chat API: 2.6.13
Create: Interiors: 0.6.1
Create Offroad: 1.2.1
Cristel Lib: 3.0.3
Activity
[-]Elevator contraption glitching when used on simulated object on server[/-][+]Elevator contraption glitching when used on landed simulated object on server [/+]Kaddotjar commentedon May 1, 2026
Bug still occurs on sable 1.2.2 and occurs when going down on the elevator too but does not occur when in air
Kaddotjar commentedon May 1, 2026
Also I've noticed other players go invisible when on the contraption, I'll test and update if it still occurs when in air
Kaddotjar commentedon May 1, 2026
Players do not go invisible when in air, seems the bug only occurs when the ship is on the floor and not moving
NickoNick-dot commentedon May 8, 2026
This also happens to me on a moving contraption in the air, but not all the time?
When the ship is moving it also pushes me in the elevator.
also seems to happen when I'm sitting in the elevator.
LIMachi commentedon May 17, 2026
I have the same issue, and after some testing I have this conclusion: It has nothing to do with being "landed", it's more like, if the pulley is more than ~15 blocks aways (Y axis) than it's original position (at time of assembling/world loading) that the teleporting happen (and the distance of the tp seem somewhat proportional to that distance on the Y axis). Having 1 or more simulated contraptions doesn't seem to affect this.
It's probably due to how the pulley contraption tries to keep you on the contraption while running (keep your Y axis correct while moving, while leaving you free to roam on the X and Z axis), and the pulley being confused on it's actuall Y position (so maybe it's also base Create fault).
Hope this help :) (and that the issue will be fixed, I would have been screwed if I didn't add emergency ladders on my ship when I finally brought it to my survival world :P )
LelouBil commentedon May 22, 2026
Same issue here, players disappearing when entering, and being visible very high above the elevator by other players (when in their pov they are inside) and when changing floors you flicker between high up and the elevator before finally falling through the elevator
LIMachi commentedon May 24, 2026
Another thing that I tested (forgot to test before): breaking and replacing the elevator block in a sublevel doesn't fix the issue, and dissasembling and reasembling the sublevel doesn't seem to fix the issue either (which is surprising to me). My current guess is: the elevator uses the elevation in the sublevel to try to snap us to the correct Y level, and I don't know how the sublevels work, but my guess is that builds are centered on the middle Y elevation when built (so for a standard level going from -64 to 320, that would be y:
127~128, my elevator relative to the center of my ship is at Y +14, and when I'm inside the moving part I'm at Y +8, so if I start moving, I should be teleported to the height127~128+8~7, so in the range135~137+ the movement of the elevator downwards, I get teleported to height 131, which is sligtly off from my predictions, but If we take into account the speed of the elevator and my falling speed when I took the screenshots, it could account for the inaccuracy). Now, to fix this there is multiple solutions, but my guess would be to patch the code of the elevator so when in a sublevel, it doesn't use it's block position in world but a custom vector (as using an approximation of the block position would incur phasing/falling since sublevels are almost never perfectly aligned with the real world), and if other moded blocks (create or not) use similar systems, they might need patches too. (sorry for the big post once again, and for my weird phrasing patern, I'm not english :P )