How do I make sure the player is on a specified brick when he clicks the button?

I am trying to make a timer for an obby. I want the player to be at the start of the obby when he clicks the button on his screen to start the timer. I tried doing this with Touched and TouchEnded events but they don't work properly. I will idle on the starting brick and Roblox will say I'm not touching the brick when I am clearly touching the brick. The way the system is set up if Roblox says I'm not on the brick then I can't click the start timer button. Is there any way possible I could do what I want without using Touch and TouchEnded events because the are not reliable?

Client Code

--Loads event which will be needed to start the timer
local startTimerEvent = game.ReplicatedStorage.StartTimerEvent
local player = game.Players.LocalPlayer
--Starting place of the obby
local startBrick = game.Workspace.StartObby
--Is the player touching the brick?
local touchedStart = false

startBrick.Touched:Connect(function(hit)
	--Checks to make sure the one who is touching the brick is the same player
	--and not some other touching the brick
	if game.Players:GetPlayerFromCharacter(hit.Parent) == player then
		touchedStart = true
		print("Touched Began")
	end
end)

startBrick.TouchEnded:Connect(function(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) == player then
		touchedStart = false
		print("Touch Ended")
	end
end)

script.Parent.MouseButton1Click:Connect(function()
	if touchedStart then --If I am at the start then execute code
		print("Fired")
		--This next code tells the server to start the timer and stops the timer when
		--the player is dead.
		startTimerEvent:FireServer(player)
	end
end)

There is a function called “GetTouchingParts()”, it makes a table and you could use for I, v in pairs, and do if v.Parent.Name == the players name then do whatever you want to do.