🐛 [BUG]堆叠柱状图一旦进行分组设置以后，Meta里的设置便不起作用了

### 🐛 Bug description [Please make everyone to understand it]

> Please provide a link by forking these links [G2Plot](https://codesandbox.io/s/g2plot-issue-template-gzfdq?file=/index.ts) or GitHub repo, a minimal reproduction.

* _Required_ **Link to minimal reproduction**:
* https://codesandbox.io/s/smoosh-microservice-cp8j7i?file=/index.ts

### 📷 Step to reproduce

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

* **G2Plot Version**:2.4.25
* **Platform**:Mac OS

Start with the linked CodeSandbox reproduction at index.ts and reproduce the stacked bar chart after grouping is enabled. Compare the resulting Meta settings with the expected screenshot and verify that the settings still take effect after the fix; use G2Plot version 2.4.25 as the reported baseline.

Written by the indexing model from the issue text.