how do i stop a remotefunction script not able to disconnect?

I want to know a bit of knowing how to stop a remotefunction not able to disconnect if i press a E then after that i press 0 I am having this trouble because when i press E then after i press 0. when the 0 keybind script doesnt have ServerInvoke() it just make my remotefunction still on while is not disconnecting, ???

Keybind E Local scripts:

local UIS = game:GetService("UserInputService")
local debounce = true
local plr = game.Players.LocalPlayers

UIS.InputBegan:Connect(function(Input)
    if Input.KeyCode == Enum.KeyCode.E and Debounce == true then
        Debounce = false
        script.Ora:InvokeServer()
        wait(3.2)
        Debounce = true
    end
end)

RemoteFunction OnServerInvoke scripts:

local HandleBlade = script.Parent.Parent.Parent.Parent.Handle.Handle
local hT  
local dmg = 3

script.Parent.OnServerInvoke = (function() 
    hT = HandleBlade.Touched:Connect(function(hit)
        if hit.Parent:FindFirstChild('Humanoid') then
            hit.Parent.Humanoid:TakeDamage(dmg)
        end
        wait(1)
        if lhT then
            lhT:Disconnect()
        end
    end)
end)

0's LocalScripts:

repeat wait() until game.Players.LocalPlayer

k = game.Players.LocalPlayer:GetMouse()

k.KeyDown:connect(function(key)
    if key == "0" then
        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 20
    end
end)

k.KeyUp:connect(function(key)
    if key == "0" then
        game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 16
    end
end)