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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
} from './ReactChildFiber';
import {
  processUpdateQueue,
  cloneUpdateQueue,
  initializeUpdateQueue,
} from './ReactUpdateQueue';
import {
  NoWork,
  Never,
  Sync,
  computeAsyncExpiration,
} from './ReactFiberExpirationTime';
import {
  ConcurrentMode,
  NoMode,
  ProfileMode,
  StrictMode,
  BlockingMode,
} from './ReactTypeOfMode';
import {
  shouldSetTextContent,
  shouldDeprioritizeSubtree,
  isSuspenseInstancePending,
  isSuspenseInstanceFallback,
  registerSuspenseInstanceRetry,
} from './ReactFiberHostConfig';
import type {SuspenseInstance} from './ReactFiberHostConfig';
import {shouldSuspend} from './ReactFiberReconciler';
import {pushHostContext, pushHostContainer} from './ReactFiberHostContext';
import {