series中的tooltip不生效，无法显示

[Lyle666]

Version

5.0.0-beta.0

Steps to reproduce

{
            type: 'scatter',
            coordinateSystem: 'geo',
            name: 'USA',
            symbol: `image://${svg}`,
            symbolSize: 15,
            tooltip: {
              trigger: 'item',
              triggerOn: 'mousemove',
              showContent: true,
              confine: false,
              position: 'right',
              formatter: function(params) {
                console.log(params);
                let imgUrl = params.data.thumbnail;
                let htmlStr = `<img style=width:20px;height:15px; src= ${imgUrl}/>`;
                return htmlStr;
              }
            },
            itemStyle: {
              color: '#ddb926'
            },
            data: this.mapData
          },

What is expected?

提供一些解决方案

What is actually happening?

tooltip无法显示

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[susiwen8]

Does this work with 4.9?

[mmm2006]

我测试了也不能工作，包括在data下面设置也不行。不知道哪里设置的不对，我的版本就是4.9

[susiwen8]

@mmm2006 麻烦提供一个完整的case 吧

[mmm2006]

@susiwen8 ,我从网上查了下，这个问题解决，事需要在option下面series 同级别也加一个空的tooltip就可以生效了：
tooltip: {},

我自己的问题其实是这个：
#13630

如果可以，帮忙看下，谢谢