mouse.KeyUp firing multiple times?

Hi!

So, I'm scripting a barrage, kind of like in JoJo, and the event that stops the sound that plays when you begin to barrage is firing multiple times. Specifically, the mouse.KeyUp fires multiple times, even though I'm only releasing one key. I've tried to use UIS.InputEnded, but it comes with the same results.

The specific part that is probably broken

if not tobreak then
					keyUp = mouse.KeyUp:Connect(function(key)
						if key == "e" then
							keyUp:Disconnect()
							model.PlaySound:FireServer(newsoundE, newsoundE.IsPlaying)
							EAnim:Stop()
							rightarmHitbox:HitStop()
							leftarmHitbox:HitStop()
							humanoid.WalkSpeed = settingsModule.defaultSpeed
							humanoid.JumpPower = settingsModule.defaultJump
							newsoundE:Stop()
							print("stopping sound1")
							tobreak = true
						end
					end)
				end

The play sound event (the server just fires this event to all players except the one who sent it. If you want that code, just tell me)

RS.PlaySoundClient.OnClientEvent:Connect(function(sound, isPlaying)
	print(sound.Name)
	if isPlaying then
		print("stopping sound"..sound.Name)
		sound:Stop()
		return
	else
		print("playing sound"..sound.Name)
		local newsound = sound:Clone()
		newsound.Parent = sound.Parent
		newsound:Play()
		wait(newsound.TimeLength)
		newsound:Destroy()
		return
	end
end)

Full barrage script

repeat
			local crazyNumber = 0.2
			local arm = 1
			barragepunches = barragepunches + 1
			while true do
				if not workspace.InTimeStop.Value or workspace.WhoStoppedTime.Value == plr.Name then
					EAnim:AdjustSpeed(1)
					break
				end
				EAnim:AdjustSpeed(0)
				wait(.1)
			end
			if UIS.KeyboardEnabled then
				if not tobreak then
					keyUp = mouse.KeyUp:Connect(function(key)
						if key == "e" then
							keyUp:Disconnect()
							model.PlaySound:FireServer(newsoundE, newsoundE.IsPlaying)
							EAnim:Stop()
							rightarmHitbox:HitStop()
							leftarmHitbox:HitStop()
							humanoid.WalkSpeed = settingsModule.defaultSpeed
							humanoid.JumpPower = settingsModule.defaultJump
							newsoundE:Stop()
							print("stopping sound1")
							tobreak = true
						end
					end)
				end
			else
				if not tobreak then
					for i, button in pairs(mobileButtons:GetChildren()) do
						buttonUp = button.MouseButton1Up:Connect(function()
							if button.Name == "EButton" then
								buttonUp:Disconnect()
								model.PlaySound:FireServer(newsoundE, newsoundE.IsPlaying)
								EAnim:Stop()
								rightarmHitbox:HitStop()
								leftarmHitbox:HitStop()
								humanoid.WalkSpeed = settingsModule.defaultSpeed
								humanoid.JumpPower = settingsModule.defaultJump
								newsoundE:Stop()
								print("stopping sound 2")
								tobreak = true
							end
						end)
					end
				end
			end
			if tobreak then
				break
			end
			if arm == 1 then
				rightarmHitbox:HitStart()
				wait(crazyNumber)
				rightarmHitbox:HitStop()
				arm = 2
			else
				leftarmHitbox:HitStart()
				wait(crazyNumber)
				leftarmHitbox:HitStop()
				arm = 1
			end
		until barragepunches >= settingsModule.punches