결제 위젯 콘솔에 [Deprecation] Warning message가 나옵니다.

Listener added for a synchronous 'DOMNodeRemovedFromDocument' DOM Mutation Event. This event type is deprecated (https://w3c.github.io/uievents/#legacy-event-types) and work is underway to remove it from this browser. Usage of this event listener will cause performance issues today, and represents a risk of future incompatibility. Consider using MutationObserver instead.