How to fix inconsistent camera CFrame?

I am trying to set the camera of the game on a fixed position and rotate around itself. The problem is every time I run the game the camera either ends up in the position I set or some other position which is the same but the y value is a random negative number instead of 10. The rotation works fine but I can’t understand why the script doesn’t work… and yes no other script is changing the camera’s position.

local camera = workspace.CurrentCamera
local plr = game.Players.LocalPlayer

camera.CameraType = Enum.CameraType.Scriptable
camera:GetPropertyChangedSignal("CameraType"):Wait()
camera.CameraType = Enum.CameraType.Scriptable
camera.CFrame = CFrame.new(0,10,0)
game:GetService("RunService").Heartbeat:Connect(function(dt)
    camera.CFrame = camera.CFrame * CFrame.Angles(0,math.rad(1)*dt*60,0)
end)