[Bug] Scatter series on different zlevels re render when not needed

### Version

6.0.0

### Link to Minimal Reproduction

https://codepen.io/ddegan/pen/myVOEJV?editors=0011

### Steps to Reproduce

1. Open the provided link
2. Click on one of the scatter points.
3. Observe that the large dataset is re-render

### Current Behavior

Setting a series that is placed on a different zlevel just create a new canvas object but then all the points are re-rendered when the series with a single point is changed

### Expected Behavior

just the changed series with a different zlevel should be rerendered

### Environment

```markdown
- OS: Windows 11 pro
- Browser: Chrome 140.0.7339.208
```

### Any additional comments?

Don't know if I'm doing something wrong or misintrerpreting the zlevel purpose.