[Bug] Datazoom label disappear after unclick

### Version

5.4.3

### Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?code=PYBwLglsB2AEC8sDeBYAULWZjADaRAC5kBfAGnU1wFMBza6AE2KXMtkYEMxOAtHALYswATxDViAIgDOuCI2oAnSWwywAHgEF1EaS3aYuPYgG1JAWRiSysSQBUArtWu2A6tUYv7ACwdeAYooQXgDK3KEO0JIAuuyqmCLauizxsNJKENR6sCaoapjQnAIStmE01gZYYiWSAEacyhT5HNycpgCsNgBMAAw2AMwAbDYAjH2wY93jACzRTZiY9YoAwtx0wIoiAOKcRLDtPXGxaCRAA&_source=echarts-doc-preview

### Steps to Reproduce

1. Create chart
2. Add datazoom.slider
3. Drag the handle but keep the mouse over it.
4. Unclick without moving the mouse.

### Current Behavior

The handle's label disappears.

### Expected Behavior

The handle's label should keep showing if the mouse is still over the handle.

### Environment

```markdown
eCharts examples
```

### Any additional comments?

_No response_