UI glitches while loading

I have the following scene canvas elements:

left panel
	character game object
right panel
	option panel - vertical layout group, content size fitter
		slider panel - vertical layout group, content size fitter
			input panel - horizontal layout group, content size fitter
				text
				slider
			input panel - horizontal layout group, content size fitter
				text
				slider
		button

After I hit play, the button’s Y position is wrong but corrects itself after a brief second. Why is this happening and how do I fix it?

I fixed it by only having the content size fitter on “option panel” and removing it from all children.