Inv dissapears when I log off then back on

When I log on to my server I lose the items in my inv, I have tested to see if it was just a glitch so i spent over 20 mins testing the glitch/bug and i put any item in my inv then leave and it randomly is gone, I dont know if its a plugin or something in a config. At first i wouldn't be able to /setspawn but fixed that then everyones inv dissapears when they rejoin
My Plugins Are
SimpleVideoAction
GroupManager
PlugMan
WorldEdit
ServerInfoEditor
IDisguise
NoRain
Smash_Brawl
Vault
MultiVerse-Core
ProtocolLib
EmptyWorldGenerator
HolographicDisplays
Color4Signs
uSkyBlock
WorldGuard
AntiLagg
Essentials
Citizens
PunishMental
EssentialsProtect
EssentialsSpawn
EssentialsChat
EssentialsAntiBuild

 

Does anything appear on the console when this problem occurs.
Delete all your plugins (Keep backup) and see if it still happens if so change your server version if it does not add the plugins 1 by 1!

 

Fixed! What it was was SimpleVideoMaker was deleteing my inv because it thought i was entering camera mode when we joined so it was deleted (plus the plugin wasent really that good)