The "Back" button on the "Experimental feature requirements" menu can have part or all of its outline missing with low GUI scale

Steps to Reproduce:

1) Set GUI scale to lowest possible
2) Open "Create New World" screen
3) Click on the "More" tab
4) Press "Data Packs"
5) Add all experimental packs
6) Press "Done" then press "Details"
7) The back button on this screen is missing its outline