nextjs with app dir, why getNewCSS?

[macrozone]

i followed https://tamagui.dev/docs/guides/next-js#server-components

to setup nextjs with app dir.

hower i noticed that the server response only has the right styling on the first load, after reloading the page, you don't get any ssr response.

I saw this is because of getNewSsr, but i don't understand why this function is used over getCSS