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.
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        for (let i = 0; i < listeners.length; i++) {
          unmountHostEventListener(listeners[i]);
        }
        listenerMap.clear();
      }
    };
    const destroy = (target: Node) => {
      
      
      
      
      
      
      
      
      
      
      
      
      listenerMap.delete(target);
    };
    const reactListenerMap: ReactListenerMap = {
      clear,
      setListener(
        target: EventTarget | ReactScopeMethods,
        callback: ?(Event) => void,
      ): void {
        if (