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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
fiber.effectTag = (fiber.effectTag & ~Hydrating) | Placement;
  if (__DEV__) {
    switch (returnFiber.tag) {
      case HostRoot: {
        const parentContainer = returnFiber.stateNode.containerInfo;
        switch (fiber.tag) {
          case HostComponent:
            const type = fiber.type;
            const props = fiber.pendingProps;
            didNotFindHydratableContainerInstance(parentContainer, type, props);
            break;
          case HostText:
            const text = fiber.pendingProps;
            didNotFindHydratableContainerTextInstance(parentContainer, text);
            break;
          case SuspenseComponent:
            didNotFindHydratableContainerSuspenseInstance(parentContainer);
            break;
        }
        break;
      }
      case HostComponent: {
        const parentType = returnFiber.type;
        const parentProps = returnFiber.memoizedProps;
        const parentInstance = returnFiber.stateNode;
        switch (fiber.tag) {
          case HostComponent:
            const type = fiber.type;
            const props = fiber.pendingProps;