I have these 2 actions:

export async function signInAction({ jwt }: { jwt: string }) {
  cookies().set(COOKIE_KEYS.JWT, jwt, { secure: true });
}

and:

export async function isAuthAction() {
  const jwt = cookies().get(COOKIE_KEYS.JWT)?.value;

  return { isAuth: Boolean(jwt) };
}

on localhost they work fine but on prod they throw 404