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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
current: Fiber | null,
  workInProgress: Fiber,
  Component: any,
  nextProps: any,
  updateExpirationTime,
  renderExpirationTime: ExpirationTime,
): null | Fiber {
  if (current === null) {
    let type = Component.type;
    if (
      isSimpleFunctionComponent(type) &&