User input service detecting right mouse button as left mouse button

[Amateur_Programmer]

Trying to detect RMB input, LMB input is detected when I press the RMB.

On below image, I pressed the RMB 4 times. It outputs as LMB (MB1)

My goal for this post is to:
A. Figure out if I am doing something wrong.
B. Figure out if this is a roblox bug.
C. Hardware error?

If you have any information on why this is happening, please help out!
Thanks!

Code Below:

-- Ui toggle & mode enable / disable
		buildModeEnabled = true
		nonInputs_folder:WaitForChild("CoreGui").Value.Enabled = buildModeEnabled

		-- Get mouse inputs while build mode is enabled
		local mouse = local_plr:GetMouse()
		
		-- Editing objects input
		local startClick = nil
		local allowEdit = nil
		
		local connected_Buildmode1 = UIS.InputBegan:Connect(function(input)
			
			startClick = os.clock()
			
			while allowEdit == nil do
				task.wait()
			end
			
			if allowEdit == true then
				
				allowEdit = nil
			elseif allowEdit == false then

				allowEdit = nil
				return
			end
			
			warn(input.UserInputType == Enum.UserInputType.MouseButton2, input.UserInputType)
			
			if input.UserInputType == Enum.UserInputType.MouseButton2 then -- Editing / Selecting parts
				
				local hit = mouse.Target
				if hit then
					
					if hit.Parent.Parent.Name == "Objects" then
						
						-- Below put functions for UI input and keybind input for editing objects
						
						local function select_new_object()

							if old_box then old_box:Destroy() end

							local box = Instance.new("SelectionBox")
							box.Adornee = hit
							box.Parent = hit
							box.Color3 = Color3.fromRGB(0, 170, 255)

							nonInputs_folder:WaitForChild("EditMenu").Value.Enabled = true
							
							old_box = box
						end	
						
						select_new_object()
						
					end
				end
			end
		end)
		
		-- why does below exist?
		-- no event for click, so I will detect a click myself (click would be mouse down then up right after)
		local connected_Buildmode2 = UIS.InputEnded:Connect(function(input)
			
			if input.UserInputType == Enum.UserInputType.MouseButton2 then
				
				local delta = os.clock() - startClick
				
				if delta < 0.5 then
					allowEdit = true
				else
					allowEdit = false
				end
			end
		end)

[PUGARECOOLYA1 (puggie)]

I can’t say for sure as I’ve never had this issue, so I can only say it may just be the hardware. Try maybe using another mouse, or even getting another player to try the same script. If it still occurs, prob a bug.

[2112Jay]

This is a cut down version of your script focused on just showing the right click.
This is tested and will print: Left mouse click detected! If this isn’t working for you, it’s not the script. It has to be something else …

Script

local UIS = game:GetService("UserInputService")
local mouse = game.Players.LocalPlayer:GetMouse()

local startClick = nil
local allowEdit = nil

local connected_Buildmode1 = UIS.InputBegan:Connect(function(input)
	startClick = os.clock()

	while allowEdit == nil do
		task.wait()
	end

	if allowEdit == true then
		allowEdit = nil
	elseif allowEdit == false then
		allowEdit = nil
		return
	end

	if input.UserInputType == Enum.UserInputType.MouseButton2 then
		print("Left mouse click detected!")
	end
end)

local connected_Buildmode2 = UIS.InputEnded:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton2 then
		local delta = os.clock() - startClick
		allowEdit = delta < 0.5
	end
end)

[Amateur_Programmer]

Thanks for making it simplified.

For some reason the game still picks up RMB as LMB (note that it eventually fixes itself)

After some spamming

[Amateur_Programmer]

Please note that when I play games, the right click is never detected as left click. So this is a roblox problem, maybe.

[Amateur_Programmer]

I think it may be a roblox bug. Image below describes situation

[Amateur_Programmer]

Re-ordered following code and it started working correctly.

local connected_Buildmode1 = UIS.InputBegan:Connect(function(input)
			
			if input.UserInputType ~= Enum.UserInputType.MouseButton2 then
				return
			end
			
			startClick = os.clock()

			while allowEdit == nil do
				task.wait()
			end

			if allowEdit == true then
				allowEdit = nil
			elseif allowEdit == false then
				allowEdit = nil
				return
			end
			
			local mouse = local_plr:GetMouse()
			local instance = mouse.Target
			
			if instance then
				if instance.Parent.Parent.Name == "Objects" then
					
					if old_box then old_box:Destroy() end
					
					local box = Instance.new("SelectionBox")
					box.Color3 = Color3.fromRGB(0, 170, 255)
					box.Adornee = instance
					box.Parent = instance
					old_box = box
					
					
					
				end
			end
		end)