[MC-234240] You cannot hold the TAB key to navigate between buttons quickly in the "Superflat Customization" menu

You cannot hold the TAB key to navigate between buttons quickly in the "Superflat Customization" menu.

Navigate to the singleplayer menu.
Click on the "Create New World" button.
Hold down the TAB key and take note of how you rapidly switch between the selection of buttons.
Click on the "More World Options" button.
Change the world type to "Superflat" and then hit the "Customize" button.
Hold down the TAB key and observe the selection of buttons closely.
Take note as to whether or not you can hold the TAB key to navigate between buttons quickly in the "Superflat Customization" menu.

You cannot hold the TAB key to navigate between buttons quickly.

You would be able to hold the TAB key to navigate between buttons quickly, just like how you're able to in most other menus.