datazoom,showDataShadow=true，在滑动时会丢失。

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. 第一次渲染datazoom没问题，看到了数据
2. 在datazoom 上滑动时，缩略图丢失。

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.
演示视频
dataZoom: [ { type: 'slider', show: true, start: Math.max(0, dates.length - 30), // end: 100, height: 30, bottom: 10, left: 10, right: 10, zoomLock: true, brushSelect: false, moveOnMouseMove: false, preventDefaultMouseMove: true, handleSize: 0, realtime: true, filterMode: 'filter', showDataShadow: true, showDetail: false, // 添加以下关键配置 dataBackground: { lineStyle: { color: '#ccc', // 阴影线条颜色 width: 1 }, areaStyle: { color: 'rgba(150, 150, 150, 0.3)' // 阴影区域颜色 } }, backgroundColor: 'rgba(0,0,0,0)', // 透明背景 fillerColor: 'rgba(200, 200, 200, 0.2)', // 中间填充色 borderColor: '#ccc', handleStyle: { color: '#fff', borderColor: '#000' } } ]

Smartphone (please complete the following information):

• Device: iPhone13
• OS: 18.5

Start with the provided dataZoom configuration and reproduce the issue on an iPhone 13 or equivalent environment, focusing on showDataShadow during slider movement. Trace the data shadow rendering and update path, then verify that the thumbnail remains visible while sliding with the reported options.