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

Notice the flash. I'd expect `suspended` to be `true` during the high pri render.
} from './ReactFiberWorkLoop';
const ReactCurrentOwner = ReactSharedInternals.ReactCurrentOwner;
let didReceiveUpdate: boolean = false;
let didWarnAboutBadClass;
let didWarnAboutModulePatternComponent;
let didWarnAboutContextTypeOnFunctionComponent;
let didWarnAboutGetDerivedStateOnFunctionComponent;
let didWarnAboutFunctionRefs;
export let didWarnAboutReassigningProps;
let didWarnAboutRevealOrder;
let didWarnAboutTailOptions;
let didWarnAboutDefaultPropsOnFunctionComponent;
if (__DEV__) {
  didWarnAboutBadClass = {};
  didWarnAboutModulePatternComponent = {};
  didWarnAboutContextTypeOnFunctionComponent = {};
  didWarnAboutGetDerivedStateOnFunctionComponent = {};
  didWarnAboutFunctionRefs = {};
  didWarnAboutReassigningProps = false;
  didWarnAboutRevealOrder = {};
  didWarnAboutTailOptions = {};
  didWarnAboutDefaultPropsOnFunctionComponent = {};
}
export function reconcileChildren(
  current: Fiber | null,
  workInProgress: Fiber,
  nextChildren: any,
  renderExpirationTime: ExpirationTime,
) {
  if (current === null) {