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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
import type {Fiber} from './ReactFiber';
import type {
  Instance,
  TextInstance,
  HydratableInstance,
  SuspenseInstance,
  Container,
  HostContext,
} from './ReactFiberHostConfig';
import type {SuspenseState} from './ReactFiberSuspenseComponent';
import {
  HostComponent,
  HostText,
  HostRoot,
  SuspenseComponent,
} from './ReactWorkTags';
import {Deletion, Placement, Hydrating} from './ReactSideEffectTags';
import invariant from 'shared/invariant';
import {
  createFiberFromHostInstanceForDeletion,
  createFiberFromDehydratedFragment,