Issue with endlessly increasing addon memory

[Clamsoda]

Good Evening everyone,

I wanted to inquire about an issue I am having with an addon I am creating/modifying.

I used to use Shadowed's DamnChatTabs addon to hide the chat frame tabs, but considering I never utilized it to toggle tab visibility, just hiding them, I decided to cut the saved variables out, and bring it up to current standards (getglobal() being deprecated and the like).

Everything is going....well, it works fine, but whenever I mouseover the chat window, the addon memory increases by around 30kb every time, and I can cause this to continue infinitely. After a while it does return to a reasonable level (never less than after I first log in/reload the UI).

Can anyone shed any light on why the memory continues to increase with no end?

--[[
Nearly -ALL- credit goes to Shadowed's DamnChatTabs addon.
 
I have stripped the code down, and modified it -SLIGHTLY- to disable 
all chat tabs by default, and added support for hiding the pet battle tab.
]]--
local _G = _G
 
-- Function to determine the number of active chat windows, borrowed from Tekkub's FloatingChatFrame
local function GetNumActiveChatFrames()
    local count = 0
    local chatFrame
    for i = 1, NUM_CHAT_WINDOWS do
        chatFrame = _G["ChatFrame"..i]
        if (chatFrame) then
            if (shown or chatFrame.isDocked) then
                count = count + 1
            end
        end
    end
    return count
end
 
local function hideTab(self)
    if (self.tabHide and self.tabHooked) then
        self:Hide()
    end
end
 
local eventHandler = CreateFrame("Frame")
eventHandler:RegisterEvent("ADDON_LOADED")
-- frame:RegisterEvent("PET_BATTLE_OPENING_START")  -- Event to hook for hiding the PetBattle Chat Tab (ChatFrame11Tab)
eventHandler:SetScript("OnEvent", function(self, event, addon)
    if (event == "ADDON_LOADED" and addon == "ClamChatTabHider") then
        for i = 1, GetNumActiveChatFrames() do
            local frame = _G["ChatFrame"..i.."Tab"]
            if (not frame.tabHooked) then
                if (frame) then
                    if (frame:GetScript("OnShow")) then
                        frame:HookScript("OnShow", hideTab)
                    else
                        frame:SetScript("OnShow", hideTab)
                    end
                    frame.tabHide = true
                    frame.tabHooked = true
                    frame:Hide()
                end
            end
        end
    eventHandler:UnregisterEvent("ADDON_LOADED")
    end
end)

Thanks so much for taking the time to help me.