User Imput Service works in chat too?

Hello, I am doing a Difficulty Chart obby and I added a "Press R to reset" function, but the character resets even if pressing "R" while typing in the chat.

Here's the script:

local uis = game:GetService("UserInputService")
local character = script.Parent
local reset = false
local humanoid = character:WaitForChild("Humanoid")

uis.InputBegan:Connect(function(key)
	if key.KeyCode == Enum.KeyCode.R then
		reset = true
		humanoid.Health = 0
	else
		reset = false
	end
end)

I would the function to only work when not in the chat, as it is annoying.