My LocalScript who move my chat make a mistake with the first person?

Hi guys, I want to know about a bug that happened with my script recently. When my script is active, I can't control the camera when i zoom in in first person. But when it's disabled it works. Could anyone help me with this ? I want to move the chat but the technique i used was garbage. Thanks:3

That is my LocalScript:

local Player = game:GetService('Players').LocalPlayer
local PlayerGui = Player:WaitForChild('PlayerGui')

--< Functions
local function MoveChat()
    local ChatGui = PlayerGui:WaitForChild('Chat')
    ChatGui.Frame.Size = UDim2.new(0.95, 0, 0.95, 0)
    ChatGui.Frame.Position = UDim2.new(0.025, 0, 0.025, 0)
    Instance.new('UIAspectRatioConstraint', ChatGui.Frame)

    ChatGui.Frame.ChatBarParentFrame.Size = UDim2.new(0.45, 0, 0.065, 0)
    ChatGui.Frame.ChatBarParentFrame.Position = UDim2.new(0, 0, 0.13, 0)

    ChatGui.Frame.ChatChannelParentFrame.Size = UDim2.new(0.45, 0, 0.3, 0)
    ChatGui.Frame.ChatChannelParentFrame.Position = UDim2.new(0, 0, 0.2, 0)

    ChatGui.Frame.ChannelsBarParentFrame.Size = UDim2.new(0, 0.45, 0.065, 0)
    ChatGui.Frame.ChannelsBarParentFrame.Position = UDim2.new(0, 0, 0.13, 0)
end

-- CoreGui
MoveChat()