Why is this gui occasionally sticking after the player has stopped touching the brick?

This is supposed to trigger a screen gui for the player when they touch a brick, keep the gui up while they remain touching that brick, and then remove the gui once the touch ends. For the most part, it works. However, occassionally, the gui will flicker while they run into the brick, and even more rarely sometimes the gui gets stuck on the screen, even though the player has long since walked away from the brick.

Does anyone have any advice on how I can solve this? I feel like I must not be using debounces properly, but I'm having a very hard time figuring out what exactly I'm doing wrong.

script.Parent.Transparency = 1 
local inRange = false
local isTouched = false
local store = script.StoreScript
local debounce = false
local eDebounce = false
local range = false

--Remote Events
local storeGuiEvent = Instance.new("RemoteEvent")
storeGuiEvent.Parent = game.ReplicatedStorage
storeGuiEvent.Name = "storeGuiEvent"

local storeGuiEventEnd = Instance.new("RemoteEvent")
storeGuiEventEnd.Parent = game.ReplicatedStorage
storeGuiEventEnd.Name = "storeGuiEventEnd"

local createStoreRequest = Instance.new("RemoteEvent")
createStoreRequest.Parent = game.ReplicatedStorage
createStoreRequest.Name = "CreateStoreRequest"



function onTouch(HIT)
        if inRange == false then
            local H = HIT.Parent:FindFirstChild("Humanoid")
            if range == false then
                range = true
                if H and not debounce and range == true then
                    debounce = true
                    character = HIT.Parent
                    Player = game.Players:GetPlayerFromCharacter(HIT.Parent)
                    print("Fire")
                    storeGuiEvent:FireClient(Player)
                    debounce = false
                    inRange = true
                end

            end
        end

end


function endTouch(END)
    local E = END.Parent:FindFirstChild("Humanoid")
    if E and not eDebounce then
        eDebounce = true
        if Player == nil then
            return
        else 
            storeGuiEventEnd:FireClient(Player)
        inRange = false
        end
        eDebounce = false
        range = false
    end
end


function onCreateStoreRequested(player)
    store:Clone().Parent = character
end





script.Parent.Touched:connect(onTouch)
script.Parent.TouchEnded:connect(endTouch)
createStoreRequest.OnServerEvent:Connect(onCreateStoreRequested)