🤔 [QUESTION]浮动至地图点上不展示tooltip，在地图点周围位置可展示

### 🐛 Question description 浮动至地图点上不展示tooltip，在地图点周围位置可展示
请问使用GEOJSON类型的数据源以后,给点增加tooltip提示性文字 为什么差异会比较大。例如鼠标浮动在圆点上面,不会提示文字 需要移动至圆点周围附近才会展示tooltip提示文字

### 💻 Link to minimal reproduction

Please provide a link by forking these links [L7Plot](https://codesandbox.io/s/l7plot-issue-template-ckpvq?file=/src/index.ts) or GitHub repo. What is a minimal reproduction, and why is it required?

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

- **L7Plot Version**:0.5.11
- **Platform**:windows edge

Start with the L7Plot minimal reproduction template linked in the issue and reproduce the GEOJSON tooltip behavior on the stated L7Plot version in Edge on Windows. Compare hovering directly over a point with hovering nearby, then determine what behavior should be considered done: the tooltip displays consistently when the pointer is over the map point.

Written by the indexing model from the issue text.