[I] [Bug] `layoutIterations` not working as expected on sankey charts [echarts]

Fri, 08 Dec 2023 03:00:14 -0800 


Arch-Storm opened a new issue, #19375:
URL: https://github.com/apache/echarts/issues/19375

   ### Version
   
   5.4.3
   
   ### Link to Minimal Reproduction
   
   
https://echarts.apache.org/examples/en/editor.html?code=PYBwLglsB2AEC8sDeAoAzgUwE4Q2gXLANoqxnKnllgCeIGhARGgIbQDWGNjANJVRgC2IABYs0EAhSpUAZsADGAVymMWAEwBWLBRmgLufGbAC-RmdGDqMAcRYhCAFgAc5qpesB1COrAjCAMwATG7kADYsNMBKYACSYNgskDBSwaFk6kkshCTGZKh55NAsggywjACyAMoASgAKsAAkAIzOAAy8_HkQCYJVtGFlBYXkCsBhwFhMAEZhShidI6bp5GZdVMOFxaVMAEJKYeywdTi6Tc2OHStUPUL9NIOEmyNjE1Pls_OLI2uFv3nPYzbMqMAAqwDALDCsAAwsA0GA0OdmgFvoVbn0BkN1nlXpMmFgMOo0Xl_sYyTJARYSiCAGosHAsWYYWHwxFNABsAFYScYMfdHtIlrA8e9GITiddVlKKRsce4aUwAGIQAAeRNZCKRjRcvJk_KxT3lMlFBKJeqosulxqpCp25ROwFkPVgFQZAHMIHBGkEAOwW8gGh7Y4Ui8b48ruwl6ANkK1xqW2oqK8o1DCQiDQt1YT3ey6x2BBwVJqim8oGNgF-PLHEAXRWYS97CkuQBsDQ0SwuiY1Xq53avFgkJz6b2ByOJwgZxa-Z4sAAblD5oQLm0a4UkO3O93yr2Gi0B3Ph-7R6n0yxM66PV6mrOF0uypd122O0ouyD9odjqcWTOrkOPVPMEIShTV2RaFFB0XOYymaFFn2MTdX3fMcv0nadV0HY8gMdZ0wCvHMbx9f052g5dYD9BDKS3N8d2AyFoThLVkVRI9ALAJh6UZZkwO1bkoIfQhuSojYaJQ8pwQY3iWKw9jlTVDUmPA3VSME2AXBE2B6xxRtoAwAUQ1xcMxSjDRcGgMAA2ULB5z0PApDaAA6LkVitItDOMMtGCjLg9StCJpgwMIjUKLyc2mFgAAo2h4GK4sc30AEoA3
 kCylRKTMaCYABBRkwhSmAwCqCAAC9YJinEKX-bSTCAA
   
   ### Steps to Reproduce
   
   1. Use `layoutIterations` > 0, where a node with a higher value should be 
below a lower value.
   
   ### Current Behavior
   
   
![image](https://github.com/apache/echarts/assets/42775469/9eef5971-f4a9-4121-9fe6-4c2da9fb3827)
   
   
   ### Expected Behavior
   
   
![image](https://github.com/apache/echarts/assets/42775469/ef83a129-03c0-4c69-961c-3cd091d59558)
   
   
   ### Environment
   
   ```markdown
   - OS: Windows 11
   - Browser: Chrome 119.0.6045.200
   - Framework: /
   ```
   
   
   ### Any additional comments?
   
   Another example of a similar problem, where layoutIterations fixes the 
ordering but aligns everything to `y=0`.
   
   This is using `layoutIterations: 32` :
   
![image](https://github.com/apache/echarts/assets/42775469/e2706153-7f98-438d-8b12-b23b9901e701)
   
   Using `layoutIterations: 0`:
   
![image](https://github.com/apache/echarts/assets/42775469/fc0657e2-cbf7-483d-97e1-7151adfba209)
   
   Optimal, but currently impossible (to my knowledge) behaviour:
   
![image](https://github.com/apache/echarts/assets/42775469/e872cf48-1ba0-4a2a-8577-9e78877d813a)
   


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