🤔 [QUESTION] 为什么在我的angular项目里 使用DrawControl控件  在绘制模式开启时点击关闭会导致在控件下方再绘制出一个点  有什么办法可以控制

### 🐛 Question description [Please make everyone to understand it]

### 💻 Link to minimal reproduction

Please provide a link by forking these links [L7 Draw](https://codesandbox.io/s/l7draw-issue-template-df75t7) or GitHub repo. What is a minimal reproduction, and why is it required?

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

- **L7Draw Version**:
- **Platform**:
