Describe the bug:

Sometimes on random occasions, or disconnecting and reconnecting to a server, you are unable to re-enter a train. Attempting to do so will misplace items in your inventory, and has a high risk of deleting any armors the player is wearing. This will also duplicate random items in said player inventory when trying to either board, or access a locomotive by shift-clicking it.

Additionally, tracks might have invisible, full-sized blocks where they're present, so you can't walk on top of them anymore unless you jump. And trying to ride on a freight car or accessing its inventory may cause your game to crash.

The only way this bug stops is if you completely close your game/modpack and reload it, then all is temporarily back to normal upon rejoining the server.

There's also a bad deysync, where one player can be driving a train, and another player in the same area will either not see it move, or the train will look distorted on their screen, even if the one driving doesn't see that happening. Sometimes other players can't properly board a train somebody else is running.

How to reproduce:

Steps to reproduce the unwanted behavior:
Run a server with IR on 1.7.10, run a train with several cars on it for a bit, then disconnect from server, and reconnect without closing the game, then try accessing your train.

For the desync, have another player standing close by and run a train past them. Maybe have that same player try getting riding that same train if it has a passenger car.

Optionally, if more information is needed on this bug, or you want to see the full extent of it, download this exported Modpack, import it on CurseForge, and test it on a server. This link contains the full modpack, but heads up: It may take a bit to download. https://drive.google.com/drive/folders/1MMyOadUC7dvT0SNqkMRm_FrBRBc8sVxb?usp=sharing

Expected behavior:

Can't enter train, entering a train may misplace items in inventory, delete armor, entering freight cars might crash the game, tracks will suddenly be made of fully solid invisible blocks, and desyncs if other players are present.

System Information:

OS: Windows

Allocated Memory: [The memory allocated to your Minecraft instance where you encountered the bug e.g. "7gb"]

IR-Version: [e.g. "1.9.1_1.7.10"]

Forge-Version: [e.g. "1.7.10 - 10.13.4.1614"]

Modlist:
Avaritia
Binnie's Mods
Buildcraft
Buildcraft Compat
CodeChickenCore
CraftTweaker
Custom NPCs
ExtraCells2
Fast Craft
Magic Bees
Mine Together
Nuclear Control 2
Open Mods Lib
Open Drawers
Thaumic Energistics
The Twilight Forest
Traincraft
Advanced Solar pin
AgriCraft
Another One Bites the Dust
Applied Energistics 2
Archimedes' Ships
ASP + GS Patcher
BdLib
BiblioCraft
Big Reactors
BinniePatcher
BiomeTweaker
Blood Magic
Botania
Brandon's Core
Carpenter's Blocks
Chisel
CoFH Core
CoFH Lib
ComputerCraft
Cooking for Blockheads
Custom Main Menu
Custom Mob Spawner
CustomThings
Decocraft
Draconic Evolution
Ender IO
Ender Storage
Ender Core
Ender Tech
Ex Astris
Ex Compressum
Ex Nihilo
Extra Utilities
Extra TiC
Fast Leaf Decay
Forbidden Magic
Forestry
FoxLib
FTB Islands
FTB Library (Forge) (Legacy)
FTB Utilities (Forge)
FTBTrophies
Funky Locomotion
Gendustry
Gravitation Suite 1.7.10
Guide-API
Hardcore Questing Mode
iChunUtil
Iguanas Tinker Tweaks
Immersive Engineering
Immersive Integration
Immersive Railroading
Industrial Craft2
INpureCore
Inventory Tweaks
Iron Chests
Jabba
JourneyMap
KleeSlabs
Lockdown
Logistics Pipes
Mantle
McJtyLib
Mercurius
Minefactory Reloaded
Mo' Creatures
ModTweaker
Morph
Morpheus
NEI Addons
NEI Integration
NotEnoughItems
OpenBlocks
OpenPeripheralAddons
OpenPeripheralCore
OpenPeripheralIntegration
Pam's HarvestCraft
Project Red Compat
Project Red - Core
Project Red - Expansion
Project Red - Exploration
Project Red - Illumination
Project Red - Integration
Railcraft
Redstone Arsenal
Resource Loader
RFTools
Simply Jetpacks
Solar Expansion
Steve's Carts 2
Storage Drawers: Biomes O' Plenty
Storage Drawers: Forestry Pack
Storage Drawers: Misc Pack
Storage Drawers: Natura Pack
Tails
Thaumcraft
Thaumcraft NEI Plugin
Thaumic Exploration
Thaumic Inventory Scanning (Thaumcraft Addon)
Thermal Dynamics
Thermal Expansion
Thermal Foundation
TiC Tooltips
Tinkers Construct
Tinkers' Mechworks
Universal Mod Core
Walia
Waila Harvestability
Wawla - What Are We Looking At
Witchery
WorldEdit
WR-CBE-Universal
YUNoMakeGoodMap

Additional context
I've noticed that other people are experiencing similar, if not the same issue on 1.7.10, with at least one guy reporting a duplication bug as an additional problem.

This bug makes IR really unplayable on servers since players run the risk of losing precious items when attempting to use it, especially for those in survival mode.

same for me on 1.7.10 server i notice it work fine until you pass in another dimension after you need to restar the game entirely
but all machine are not working good even if you just launch the game