Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh

Repro: type "a" and then after a second "b"

Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.

Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
| 'useLayoutEffect'
  | 'useCallback'
  | 'useMemo'
  | 'useImperativeHandle'
  | 'useDebugValue'
  | 'useResponder'
  | 'useDeferredValue'
  | 'useTransition'
  | 'useMutableSource'
  | 'useEvent'
  | 'useOpaqueIdentifier';
let didWarnAboutMismatchedHooksForComponent;
let didWarnAboutUseOpaqueIdentifier;
if (__DEV__) {
  didWarnAboutUseOpaqueIdentifier = {};
  didWarnAboutMismatchedHooksForComponent = new Set();
}
export type Hook = {|
  memoizedState: any,
  baseState: any,
  baseQueue: Update<any, any> | null,
  queue: UpdateQueue<any, any> | null,
  next: Hook | null,
|};
export type Effect = {|
  tag: HookEffectTag,
  create: () => (() => void) | void,
  destroy: (() => void) | void,
  deps: Array<mixed> | null,
  next: Effect,