Starving Glitch? Please Help URGENT

Hi, my players are having a problem with food levels, when it displays full it still starves them and it drops like super fast (1 per step) is there a glitch i should be aware of if not then what might the problem be? please help and thanks

list of plugins

AntiRelog
Assassins
AutoMessage
BoosCooldown
Borderguard
buycraft
chestbank
citizens
commandsigns
deathcontrol
economypunga
essentials
factons
foundiamonds
groupmanager
likeaboss
linksonsigns
lottery
lwc
minebackup
moarrows
mobarena
mobdisguise
multiworld
nocheatplus
phatloots
pluginmetrics
oreobsucreter
spamguard
timetheenchanter
treeassist
votifier
worldedit
worldguard

Thanks again