Lua quest log disappearing in tasks

[Deleted member 141899]

I am using TFS 1.1, I believe it is a bug in quests.xml or taskcustom.lua (creaturescript)

After get take the quest from npc lugri, quest log appear 100%.
but some players already reported me that the quest log of the tasks of necromancer and minotaur are disappearing without no reason, in the middle of the task progress.

Quests.xml:

<mission name="Paw and Fur: Minotaurs" storageid="14004" startvalue="0" endvalue="5000" description="You already hunted |STATE|/5000 minotaurs." />
<mission name="Paw and Fur: Necromancers and Priestesses" storageid="14003" startvalue="0" endvalue="4000" description="You already hunted |STATE|/4000 necromancers and priestesses." />

taskcustom.lua:

taskcustom = {   
    ['Pirate Buccaneer'] = {storage = 14005, amount = 3000},
    ['Pirate Corsair'] = {storage = 14005, amount = 3000},
    ['Pirate Cutthroat'] = {storage = 14005, amount = 3000},
    ['Pirate Ghost'] = {storage = 14005, amount = 3000},
    ['Pirate Marauder'] = {storage = 14005, amount = 3000},
    ['Pirate Skeleton'] = {storage = 14005, amount = 3000},

    ['Minotaur'] = {storage = 14004, amount = 5000},
    ['Minotaur Archer'] = {storage = 14004, amount = 5000},
    ['Minotaur Guard'] = {storage = 14004, amount = 5000},
    ['Minotaur Mage'] = {storage = 14004, amount = 5000},

    ['Necromancer'] = {storage = 14003, amount = 4000},
        ['Blood Priest'] = {storage = 14003, amount = 4000},
        ['Blood Hand'] = {storage = 14003, amount = 4000},
        ['Shadow Pupil'] = {storage = 14003, amount = 4000},
    ['Priestess'] = {storage = 14003, amount = 4000}
}

function onKill(cid, target, lastHit)
    local creature = taskcustom[getCreatureName(target)]
    if creature then
        if isInArray({-1, creature.amount}, getPlayerStorageValue(cid, creature.storage)) or (not isInArray({14003, 14004, 14005,}, creature.storage) and getPlayerStorageValue(cid, 14500) ~= creature.storage) then
            return true
        end

        local newValue = getPlayerStorageValue(cid, creature.storage) + 1
        setPlayerStorageValue(cid, creature.storage, newValue)
        end
    return true
end

Sorry my english. Please help!