[Bug] headerCustomRender 类型为 ract作为触发事件的target时无法通过target.attribute获取到elementKey, 类型为text的element可以获取

Version

1.19.3

Link to Minimal Reproduction

1.19.3

Steps to Reproduce

在实现树表格支持按层级展开收缩的需求

层级按钮代码如下：

headerCustomRender: {
            renderDefault: true,
            elements: Array.from({ length: maxLevel }).reduce((els, _, i) => {
              const no = i + 1;
              els.push({
                type: 'rect',
                elementKey: `level-tag-react-${no}`,
                x: 140 + 26 * i,
                fill: '#468aff',
                stroke: '#468aff',
                radius: 2,
                width: 20,
                height: 20,
                y: (50 - 24) / 2,
                // cursor: 'pointer',
                // pickable: true,
              });
              els.push({
                type: 'text',
                elementKey: `level-tag-text-${no}`,
                text: no,
                x: 140 + 26 * i,
                fill: 'white',
                stroke: 'white',
                fontSize: 14,
                fontWeight: 6,
                fontFamily:
                  '-apple-system, BlinkMacSystemFont, Segoe UI, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Helvetica Neue, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol',
                y: 50 - (50 - 8) / 2,
                dx: 6,
                dy: 0,
                // cursor: 'pointer',
                // pickable: true,
              });
              els.push({
                type: 'rect',
                elementKey: `level-tag-pick-${no}`,
                x: 140 + 26 * i,
                fill: '',
                stroke: '',
                width: 20,
                height: 20,
                y: (50 - 24) / 2,
                cursor: 'pointer',
                pickable: true,
              });
              return els;
            }, []),

然后通过监听事件获取

调试发现类型为rect 的element 缺失 elementKey 属性

Current Behavior

是否是个问题？

Expected Behavior

是否是个问题？

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response

Start with the supplied headerCustomRender minimal reproduction and trace the event target for the rect and text elements. Compare how each element exposes elementKey, then verify that the intended target element key is available consistently when the event is handled.