Repro: https://codesandbox.io/s/fast-water-4i4jb

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
return (
          <>
            <Suspense fallback={<Text text="Loading..." />}>
              <Child />
            </Suspense>
          </>
        );
      }
      let setText;
      function Child() {