[Bug] Zoom twice does not correct

[zjc263]

Version

2.0.14

Link to Minimal Reproduction

https://www.visactor.io/vchart/demo/brush/brush-datazoom

Steps to Reproduce

官网案例中，第一次框选放大能得到正确的区域，第二次再选择放大区域就完全不对了

Current Behavior

二次放大以后，放大范围并非实际选区范围

Expected Behavior

二次放大以后，放大范围等于实际选区范围

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response