So I am using littletiles v1.5.0-pre158 and creative core v1.9.62 I have the problem that every time when I travel to the nether and go back to the overworld my advanced door dissapears. To fix that I have save the map and load it again.
Its always in the open state when it happens I think.

Can you send me your log file?

Can you send me your log file?

here, I just made a new modpack with only the mods that should be relevant and the problem still persisted.

`[01:28:53] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[01:28:53] [main/INFO]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[01:28:53] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[01:28:53] [main/INFO]: Forge Mod Loader version 14.23.5.2838 for Minecraft 1.12.2 loading
[01:28:53] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_191, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_191
[01:28:53] [main/INFO]: Searching J:\UserData\Dokumente\Curse\Minecraft\Instances\littele tiles\mods for mods
[01:28:56] [main/WARN]: Found FMLCorePluginContainsFMLMod marker in CreativeCore_v1.9.62_mc1.12.2.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[01:28:56] [main/WARN]: The coremod com.creativemd.creativecore.core.CreativePatchingLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[01:28:56] [main/WARN]: The coremod CreativePatchingLoader (com.creativemd.creativecore.core.CreativePatchingLoader) is not signed!
[01:28:56] [main/WARN]: Found FMLCorePluginContainsFMLMod marker in Forgelin-1.8.3.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[01:28:56] [main/WARN]: The coremod net.shadowfacts.forgelin.preloader.ForgelinPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[01:28:56] [main/WARN]: The coremod ForgelinPlugin (net.shadowfacts.forgelin.preloader.ForgelinPlugin) is not signed!
[01:28:56] [main/WARN]: Found FMLCorePluginContainsFMLMod marker in LittleTiles_v1.5.0-pre158_mc1.12.2.jar. This is not recommended, @mods should be in a separate jar from the coremod.
[01:28:56] [main/WARN]: The coremod com.creativemd.littletiles.LittlePatchingLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[01:28:56] [main/WARN]: The coremod LittlePatchingLoader (com.creativemd.littletiles.LittlePatchingLoader) is not signed!
[01:28:56] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[01:28:56] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[01:28:56] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[01:28:56] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[01:28:56] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[01:28:57] [main/INFO]: Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
[01:28:57] [main/INFO]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[01:28:57] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[01:28:57] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[01:28:57] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[01:28:57] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[01:28:57] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[01:28:58] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[01:28:58] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[01:28:58] [main/INFO]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[01:28:58] [main/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.Minecraft ...
[01:28:58] [main/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.multiplayer.WorldClient ...
[01:28:58] [main/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.entity.Entity ...
[01:28:58] [main/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.entity.player.EntityPlayer ...
[01:28:59] [main/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraftforge.client.ForgeHooksClient ...
[01:28:59] [Client thread/INFO]: Setting user: Ramog
[01:28:59] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.util.math.AxisAlignedBB ...
[01:29:00] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.entity.player.EntityPlayerMP ...
[01:29:01] [Client thread/WARN]: Skipping bad option: lastServer:
[01:29:01] [Client thread/INFO]: LWJGL Version: 2.9.4
[01:29:02] [Client thread/INFO]: -- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_191, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 6116577680 bytes (5833 MB) / 7516192768 bytes (7168 MB) up to 7516192768 bytes (7168 MB)
JVM Flags: 12 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx7168m -Xms256m -XX:PermSize=256m -XX:+UseG1GC -Xmx7G -Xms7G -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML:
Loaded coremods (and transformers):
ForgelinPlugin (Forgelin-1.8.3.jar)

CreativePatchingLoader (CreativeCore_v1.9.62_mc1.12.2.jar)

LittlePatchingLoader (LittleTiles_v1.5.0-pre158_mc1.12.2.jar)
com.creativemd.littletiles.LittleTilesTransformer
GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 430.86' Renderer: 'GeForce GTX 1060 6GB/PCIe/SSE2'
[01:29:02] [Client thread/INFO]: MinecraftForge v14.23.5.2838 Initialized
[01:29:02] [Client thread/INFO]: Starts to replace vanilla recipe ingredients with ore ingredients.
[01:29:02] [Client thread/INFO]: Invalid recipe found with multiple oredict ingredients in the same ingredient...
[01:29:02] [Client thread/INFO]: Replaced 1227 ore ingredients
[01:29:02] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraftforge.common.ForgeHooks ...
[01:29:02] [Client thread/INFO]: Searching J:\UserData\Dokumente\Curse\Minecraft\Instances\littele tiles\mods for mods
[01:29:04] [Client thread/INFO]: Forge Mod Loader has identified 10 mods to load
[01:29:04] [Client thread/INFO]: Attempting connection with missing mods [minecraft, mcp, FML, forge, creativecoredummy, littletilescore, creativecore, forgelin, littleopener, littletiles] at CLIENT
[01:29:04] [Client thread/INFO]: Attempting connection with missing mods [minecraft, mcp, FML, forge, creativecoredummy, littletilescore, creativecore, forgelin, littleopener, littletiles] at SERVER
[01:29:04] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.network.PacketBuffer ...
[01:29:05] [Thread-3/INFO]: Using sync timing. 200 frames of Display.update took 119975200 nanos
[01:29:05] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:CreativeCore, FMLFileResourcePack:Shadowfacts' Forgelin, FMLFileResourcePack:Little Opener, FMLFileResourcePack:LittleTiles
[01:29:05] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.renderer.RenderGlobal ...
[01:29:05] [Client thread/INFO]: Processing ObjectHolder annotations
[01:29:06] [Client thread/INFO]: Found 1169 ObjectHolder annotations
[01:29:06] [Client thread/INFO]: Identifying ItemStackHolder annotations
[01:29:06] [Client thread/INFO]: Found 0 ItemStackHolder annotations
[01:29:06] [Client thread/INFO]: Configured a dormant chunk cache size of 0
[01:29:06] [Forge Version Check/INFO]: [forge] Starting version check at http://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json
[01:29:06] [Forge Version Check/INFO]: [forge] Found status: AHEAD Target: null
[01:29:06] [Client thread/INFO]: [com.creativemd.littletiles.common.structure.premade.LittleStructurePremade:registerPremadeStructureType:44]: Loaded workbench model
[01:29:06] [Client thread/INFO]: [com.creativemd.littletiles.common.structure.premade.LittleStructurePremade:registerPremadeStructureType:44]: Loaded importer model
[01:29:06] [Client thread/INFO]: [com.creativemd.littletiles.common.structure.premade.LittleStructurePremade:registerPremadeStructureType:44]: Loaded exporter model
[01:29:06] [Client thread/INFO]: Applying holder lookups
[01:29:06] [Client thread/INFO]: Holder lookups applied
[01:29:06] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.renderer.BufferBuilder ...
[01:29:06] [Client thread/INFO]: Applying holder lookups
[01:29:06] [Client thread/INFO]: Holder lookups applied
[01:29:06] [Client thread/INFO]: Applying holder lookups
[01:29:06] [Client thread/INFO]: Holder lookups applied
[01:29:06] [Client thread/INFO]: Applying holder lookups
[01:29:06] [Client thread/INFO]: Holder lookups applied
[01:29:06] [Client thread/INFO]: Injecting itemstacks
[01:29:06] [Client thread/INFO]: Itemstack injection complete
[01:29:07] [Sound Library Loader/INFO]: Starting up SoundSystem...
[01:29:07] [Thread-5/INFO]: Initializing LWJGL OpenAL
[01:29:07] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[01:29:07] [Thread-5/INFO]: OpenAL initialized.
[01:29:07] [Sound Library Loader/INFO]: Sound engine started
[01:29:09] [Client thread/INFO]: Max texture size: 16384
[01:29:11] [Client thread/INFO]: Created: 512x512 textures-atlas
[01:29:11] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.renderer.BlockModelRenderer ...
[01:29:11] [Client thread/INFO]: Applying holder lookups
[01:29:11] [Client thread/INFO]: Holder lookups applied
[01:29:11] [Client thread/WARN]: Potentially Dangerous alternative prefix minecraft for name littletilestileentity, expected littletiles. This could be a intended override, but in most cases indicates a broken mod.
[01:29:11] [Client thread/WARN]: Potentially Dangerous alternative prefix minecraft for name littletilestileentityticking, expected littletiles. This could be a intended override, but in most cases indicates a broken mod.
[01:29:11] [Client thread/WARN]: Potentially Dangerous alternative prefix minecraft for name littletilestileentityrendered, expected littletiles. This could be a intended override, but in most cases indicates a broken mod.
[01:29:11] [Client thread/WARN]: Potentially Dangerous alternative prefix minecraft for name littletilestileentitytickingrendered, expected littletiles. This could be a intended override, but in most cases indicates a broken mod.
[01:29:11] [Client thread/WARN]: Potentially Dangerous alternative prefix minecraft for name littletilesparticle, expected littletiles. This could be a intended override, but in most cases indicates a broken mod.
[01:29:12] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.network.NetHandlerPlayServer ...
[01:29:12] [Client thread/INFO]: Injecting itemstacks
[01:29:12] [Client thread/INFO]: Itemstack injection complete
[01:29:12] [Client thread/INFO]: Forge Mod Loader has successfully loaded 10 mods
[01:29:12] [Client thread/WARN]: Skipping bad option: lastServer:
[01:29:12] [Client thread/INFO]: Narrator library for x64 successfully loaded
[01:29:12] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.renderer.chunk.RenderChunk ...
[01:29:12] [Client thread/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.renderer.chunk.RenderChunk ...
[01:29:15] [Server thread/INFO]: Starting integrated minecraft server version 1.12.2
[01:29:15] [Server thread/INFO]: Generating keypair
[01:29:15] [Server thread/INFO]: Injecting existing registry data into this server instance
[01:29:15] [Server thread/INFO]: Applying holder lookups
[01:29:15] [Server thread/INFO]: Holder lookups applied
[01:29:15] [Server thread/INFO]: Loading dimension 0 (New World) (net.minecraft.server.integrated.IntegratedServer@5494d904)
[01:29:16] [Server thread/INFO]: Loaded 488 advancements
[01:29:16] [Server thread/INFO]: Loading dimension -1 (New World) (net.minecraft.server.integrated.IntegratedServer@5494d904)
[01:29:16] [Server thread/INFO]: Loading dimension 1 (New World) (net.minecraft.server.integrated.IntegratedServer@5494d904)
[01:29:16] [Server thread/INFO]: Preparing start region for level 0
[01:29:16] [Server thread/INFO]: Unloading dimension -1
[01:29:16] [Server thread/INFO]: Unloading dimension 1
[01:29:16] [Server thread/INFO]: Changing view distance to 12, from 10
[01:29:17] [Netty Local Client IO #0/INFO]: Server protocol version 2
[01:29:17] [Netty Server IO #1/INFO]: Client protocol version 2
[01:29:17] [Netty Server IO #1/INFO]: Client attempting to join with 10 mods : [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]
[01:29:17] [Netty Local Client IO #0/INFO]: [Netty Local Client IO #0] Client side modded connection established
[01:29:17] [Server thread/INFO]: [Server thread] Server side modded connection established
[01:29:17] [Server thread/INFO]: Ramog[local:E:f4d4992d] logged in with entity id 1 at (259.1224044078161, 56.0, 708.7139494413705)
[01:29:17] [Server thread/INFO]: Ramog joined the game
[01:29:18] [Server thread/INFO]: Saving and pausing game...
[01:29:18] [Server thread/INFO]: Saving chunks for level 'New World'/overworld
[01:29:18] [Client thread/INFO]: Loaded 23 advancements
[01:29:19] [Thread-12/INFO]: [com.creativemd.creativecore.transformer.CreativeTransformer:transform:49]: [littletiles] Patched net.minecraft.client.renderer.BlockModelRenderer$AmbientOcclusionFace ...
[01:29:22] [Server thread/INFO]: Loading dimension -1 (New World) (net.minecraft.server.integrated.IntegratedServer@5494d904)
[01:29:29] [Server thread/INFO]: Unloading dimension -1
[01:29:30] [Server thread/INFO]: Saving and pausing game...
[01:29:30] [Server thread/INFO]: Saving chunks for level 'New World'/overworld
[01:29:46] [Client thread/INFO]: Stopping!
[01:29:46] [Server thread/INFO]: Stopping server
[01:29:46] [Server thread/INFO]: Saving players
[01:29:46] [Server thread/INFO]: Saving worlds
[01:29:46] [Server thread/INFO]: Saving chunks for level 'New World'/overworld
[01:29:46] [Server thread/INFO]: Unloading dimension 0
[01:29:46] [Server thread/INFO]: Applying holder lookups
[01:29:46] [Server thread/INFO]: Holder lookups applied
[01:29:46] [Client thread/INFO]: SoundSystem shutting down...
[01:29:46] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
`

Will be fixed in the upcoming version. Thank you very much for your help!

Finally it's out!