Problem with Mo'Creatures and Sponge

I’ve an assembly of mods that includes the Mo’Creatures mod on version 1.12.2. Have a Sponge server 1.12.2-2655-7.1.0-BETA-3065. Everything works fine until I kill a mob from Mo’Creatures. Loot falls, I take it and disconnect from the server (internal server error). But disconnection is not immediate, sometimes you need to kill 3-5 mobs, sometimes disconnected after 10. Not all mobs lead to server crash. I noticed a problem with werewolf and wild wolf.

As I understand the error in the stack of items:
at net.minecraft.entity.item.EntityItem.redirect$onAddItemStackToInventory$zfm000(EntityItem.java:778) ~[acl.class:?]
[Server thread/WARN] [net.minecraft.network.NetworkSystem]: Failed to handle packet for /127.0.0.1:53494
net.minecraft.util.ReportedException: Adding item to inventory

But I can be wrong. Nothing crash reports and server crash itself. The problem is only with Mo’Creatures other mobs from other mods work fine. After disconnection i can’t enter on the server. Helps only new generation of the world.

We need full logs (via pastebin or gist); that one line does not actually help.

I apologize, but the error extends to other mobs too. It looks as if the error occurs when I pick up loot. Recorded all server messages from logging on to the server and until an error occurred.

[01:11:58] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Zombyai joined the game
[01:12:22] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: [Zombyai: Set own game mode to Creative Mode]
[01:12:47] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: [Zombyai: Set the time to 42000]
[01:13:11] [Server thread/WARN] [net.minecraft.network.NetworkSystem]: Failed to handle packet for /127.0.0.1:54075
net.minecraft.util.ReportedException: Adding item to inventory
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:459) ~[oq.class:?]
at net.minecraft.network.NetHandlerPlayServer.redirect$onPlayerTick$zil000(NetHandlerPlayServer.java:2036) ~[pa.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_73660_a(NetHandlerPlayServer.java:173) ~[pa.class:?]
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) ~[NetworkDispatcher$1.class:?]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:285) ~[gw.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [oz.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:788) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.util.NoSuchElementException: No value present
at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_131]
at net.minecraft.entity.player.InventoryPlayer.getSpongeSlot(InventoryPlayer.java:1741) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.redirect$onAdd$zgo000(InventoryPlayer.java:1760) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70452_e(InventoryPlayer.java:284) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_191971_c(InventoryPlayer.java:425) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70441_a(InventoryPlayer.java:378) ~[aec.class:?]
at net.minecraft.entity.item.EntityItem.redirect$onAddItemStackToInventory$zfm000(EntityItem.java:778) ~[acl.class:?]
at net.minecraft.entity.item.EntityItem.func_70100_b_(EntityItem.java:400) ~[acl.class:?]
at net.minecraft.entity.player.EntityPlayer.redirect$onPlayerCollideEntity$zgm000(EntityPlayer.java:3700) ~[aed.class:?]
at net.minecraft.entity.player.EntityPlayer.func_71044_o(EntityPlayer.java:600) ~[aed.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:571) ~[aed.class:?]
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2170) ~[vp.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:234) ~[aed.class:?]
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:382) ~[oq.class:?]
… 10 more
[01:13:11] [Server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: Zombyai lost connection: Internal server error
[01:13:11] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Zombyai left the game

This is what happens when you try to reconnect to the server after an error. Full list of mods on client included

[04:41:35] [Netty Server IO #2/INFO] [FML]: Client protocol version 2
[04:41:35] [Netty Server IO #2/INFO] [FML]: Client attempting to join with 77 mods : [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]+release.109.220f184,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]$version,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]
[04:41:35] [Netty Server IO #2/INFO] [FML]: Attempting connection with missing mods [spongeapi, sponge, fastasyncworldedit, voxelsniper] at CLIENT
[04:41:37] [Server thread/INFO] [FML]: [Server thread] Server side modded connection established
[04:41:37] [Server thread/INFO] [net.minecraft.server.management.PlayerList]: Zombyai[/127.0.0.1:55372] logged in with entity id 18063 in world(0) at (201.92583668890774, 64.53584062504456, 256.70950409939815)
[04:41:37] [Server thread/INFO] [ebwizardry]: Synchronising spell glyph data for Zombyai
[04:41:37] [Server thread/INFO] [ebwizardry]: Synchronising config settings for Zombyai
[04:41:37] [Server thread/INFO] [Astral Sorcery]: [AstralSorcery] Synchronizing configuration to Zombyai
[04:41:37] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Zombyai joined the game
[04:41:37] [Server thread/WARN] [net.minecraft.network.NetworkSystem]: Failed to handle packet for /127.0.0.1:55372
net.minecraft.util.ReportedException: Adding item to inventory
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:459) ~[oq.class:?]
at net.minecraft.network.NetHandlerPlayServer.redirect$onPlayerTick$zil000(NetHandlerPlayServer.java:2036) ~[pa.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_73660_a(NetHandlerPlayServer.java:173) ~[pa.class:?]
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) ~[NetworkDispatcher$1.class:?]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:285) ~[gw.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [oz.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:788) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.util.NoSuchElementException: No value present
at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_131]
at net.minecraft.entity.player.InventoryPlayer.getSpongeSlot(InventoryPlayer.java:1741) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.redirect$onAdd$zgo000(InventoryPlayer.java:1760) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70452_e(InventoryPlayer.java:284) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_191971_c(InventoryPlayer.java:425) ~[aec.class:?]
at net.minecraft.entity.player.InventoryPlayer.func_70441_a(InventoryPlayer.java:378) ~[aec.class:?]
at net.minecraft.entity.item.EntityItem.redirect$onAddItemStackToInventory$zfm000(EntityItem.java:778) ~[acl.class:?]
at net.minecraft.entity.item.EntityItem.func_70100_b_(EntityItem.java:400) ~[acl.class:?]
at net.minecraft.entity.player.EntityPlayer.redirect$onPlayerCollideEntity$zgm000(EntityPlayer.java:3700) ~[aed.class:?]
at net.minecraft.entity.player.EntityPlayer.func_71044_o(EntityPlayer.java:600) ~[aed.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:571) ~[aed.class:?]
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2170) ~[vp.class:?]
at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:234) ~[aed.class:?]
at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:382) ~[oq.class:?]
… 10 more
[04:41:39] [Server thread/INFO] [net.minecraft.network.NetHandlerPlayServer]: Zombyai lost connection: Internal server error
[04:41:39] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Zombyai left the game