Why the .Touched stops working after a while?

Context resumee:

• I made an AnimationEvent guided skill that creates followed lightnings that fall in the mouse position.
• These cloned lightnings has scripts that uses .Touched:Connect() to damage players.
• The lightning spawned also creates a 3thrd spherical part that is the explosion in the ground before it vanishes.
• These cloned explosions (spherical Parts that grows and fades out) has scripts that uses .Touched:Connect() to damage players.

Problem:

The Touched event in the explosions and in the lightning stops working after a while. The more I move my character or the mouse the sooner it stops working, or sometimes after the skill hits my own char.

Also, the skill has no script that makes it not to damage the player casting, but somehow it started behaving like this in some point of the development, I don't know if with this i'm facing a bug or if it is just some normal behavior of animation called events (wouldn't want it different though).

• Local Script with the Player

local UIS = game:GetService("UserInputService")
local Players = game:GetService("Players")
local player = Players.LocalPlayer
local character = player.Character
if not character then
    character = game.Players.LocalPlayer.CharacterAdded:Wait()
end
local humanoid = character:WaitForChild("Humanoid")
local mouse = player:GetMouse()
local RemoteEvent = game.ReplicatedStorage.RemoteEvent
-- storm:
local StormCast = game.ReplicatedStorage.StormCast
local StormCastTrack = humanoid:LoadAnimation(StormCast)
local cooldown = false

UIS.InputBegan:Connect(function(tecla) 
    if tecla.KeyCode == Enum.KeyCode.E then 

        if not cooldown then
            cooldown = true
            StormCastTrack:Play()
        else
            print("Raios em cooldown.")
        end

        connection1 = StormCastTrack:GetMarkerReachedSignal("BeforeEnd"):Connect(function()
            StormCastTrack.TimePosition = 1.05
        end)

        connection2 = StormCastTrack:GetMarkerReachedSignal("SkyBlast"):Connect(function()
            RemoteEvent:FireServer("SkyBlast")
            local SkyBlast = game.ReplicatedStorage.SkyBlast
            local SkyBlast_C = SkyBlast:Clone()
            SkyBlast_C.Parent = game.Workspace
            SkyBlast_C.Position = Vector3.new(0,33,0)+ character.LowerTorso.Position
            local function fadeout()        
                while SkyBlast_C.Transparency < 0.95 do
                    SkyBlast_C.Transparency = SkyBlast_C.Transparency + 0.1
                    wait(0.01)
                end
                SkyBlast_C:Destroy()
            end
            fadeout()
        end)

        connection3 = StormCastTrack:GetMarkerReachedSignal("StartCasting"):Connect(function()
            while StormCastTrack.IsPlaying do
                RemoteEvent:FireServer("StormCast", mouse.hit)
                local r = math.random(0,150)/100
                wait(r)
            end
        end)

        UIS.InputEnded:Connect(function(tecla) 
            if tecla.KeyCode == Enum.KeyCode.E then 
                connection1:disconnect()
                connection2:disconnect()
                connection3:disconnect()
                StormCastTrack:Stop()
                delay(2, function() if cooldown == true then cooldown = false end end)
            end
        end)
    end
end)

• Server Script:

local RemoteEvent = game.ReplicatedStorage.RemoteEvent
local StormCast = game.ReplicatedStorage.StormCast


RemoteEvent.OnServerEvent:Connect(function(player, request, dado)

    if request == "SkyBlast" then
        local character = player.Character
        local SkyBlast = game.ReplicatedStorage.SkyBlast
        local SkyBlast_CS = SkyBlast:Clone()
        SkyBlast_CS.Name = "SkyBlast_CS"
        SkyBlast_CS.Parent = game.Workspace
        SkyBlast_CS.Position = Vector3.new(0,33,0)+ character.LowerTorso.Position
    end

    local StormCast = game.ReplicatedStorage.StormCast
    if request == "StormCast" then
        local raio1 = game.ServerStorage.Raio1
        local Raio1 = raio1:Clone()
        Raio1.Parent = workspace
        Raio1.Position = Vector3.new(dado.X,dado.Y + 29,dado.Z) + Vector3.new(math.random(-30,30)/10,0,math.random(-30,30)/10)
        Raio1.Orientation = Raio1.Orientation + Vector3.new(0, math.random(-175,175), 0)
    end


end)

• part of Server Script inside the Lightning (.touched damage and calls explosion):

script.Parent.Touched:Connect(function(hit)
    if hit.Parent:FindFirstChild("Humanoid") and debounce == false then
        debounce = true
        hit.Parent.Humanoid:TakeDamage(5)
        delay(0.3, function(bounce)debounce = false end)

    end
end)

spawn(function(explodir)
    local boomC = boom:Clone()
    boomC.Parent = workspace
    boomC.Position = raio.Position - Vector3.new(0,29,0)
end)

• part of the Server Script inside the explosion (.touched damage)

script.Parent.Touched:Connect(function(hit)
    if hit.Parent:FindFirstChild("Humanoid") and debounce == false then
        debounce = true
        hit.Parent.Humanoid:TakeDamage(5)
        delay(0.5, function(bounce)debounce = false end)
    end
end)