[Bug] Stacked Bar chart with value/number x-axis doesn't stack

### Version

5.5.1

### Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?c=bar-negative&version=5.3.0&code=PYBwLglsB2AEC8sDeBYAULTsBEAPAgrhAM7YBcy6WW2AJgIZj3mwDaAjAEwC6VWAvgBo-mbAE9CJFkiEicxAKYAnCAtIVWc6qgzU9osGJAKW2AEb0l2Ybv3U6jZhq13qm2689cbn37ABs7C6-3D5-ocF62MRMAMYA1qbMYfqyHtqR9obGphZWKZ4OTCzufnqlZXbemX4AzAAcNfoR6XYtZdFxiRTYyZH8crxo_EA

### Steps to Reproduce

Create a chart with the following options with atleast echarts v5.3.0:

```json
{
"xAxis": {
"data": [12]
},
"yAxis": {},
"series": [
{
"type": "bar",
"data": [
[
12,
61
],
],
"stack": "a",
},
{
"type": "bar",
"data": [
[
12,
38
],
],
"stack": "a",
}
]
}
```

### Current Behavior

The Bars overlap and each series starts at 0.


### Expected Behavior

The Bars should be stacked.


### Environment

```markdown
- OS: Windows 11
- Browser: Chrome 128.0.6613.138
- Framework:
```

### Any additional comments?

The Bug exists since version 5.3.0.
It still worked with version 5.2.2.