Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh

Repro: type "a" and then after a second "b"

Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.

Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
const [isLoading, setLoading] = React.useState(false);
      const start = React.useCallback(
        cb => {
          setLoading(true);
          Scheduler.unstable_next(() =>
            React.unstable_withSuspenseConfig(() => {
              setLoading(false);
              cb();
            }, config),
          );
        },
        [setLoading, config],
      );
      return [isLoading, start];
    }
    const SUSPENSE_CONFIG = {
      timeoutMs: 10000,
      busyDelayMs: 500,
      busyMinDurationMs: 400,
    };
    let transitionToPage;
    function App() {