Screen to world not accurate on same frame as camera movement?

[subsoap]

	print("pre", rendercam.screen_to_world_2d(10, 10, false, nil, false))

	rendercam.pan(100, 100, go.get_id("camera"))

	print("post", rendercam.screen_to_world_2d(10, 10, false, nil, false))

	timer.delay(1, false, function()
		print("delay", rendercam.screen_to_world_2d(10, 10, false, nil, false))
	end)

DEBUG:SCRIPT: pre	vmath.vector3(-0.97916668653488, -0.96875, -1.0002000331879)
DEBUG:SCRIPT: post	vmath.vector3(-0.97916668653488, -0.96875, -1.0002000331879)
DEBUG:SCRIPT: delay	vmath.vector3(109.76202392578, 109.8108215332, -0.057960510253906)

What should I do to get this to work so the screen to world functions are accurate after camera movement for the frame they are on?