Hirnochse opened a new issue, #19527:
URL: https://github.com/apache/echarts/issues/19527

   ### Version
   
   5.4.3
   
   ### Link to Minimal Reproduction
   
   -
   
   ### Steps to Reproduce
   
   **This is the code I use to display a rectangular plain surface :** 
   
     option = {
     tooltip: {},
     backgroundColor: '#fff',
     xAxis3D: {
       type: 'value'
     },
     yAxis3D: {
       type: 'value',
       min: 0,
       max: 6
     },
     zAxis3D: {
       type: 'value'
     },
     grid3D: {
       viewControl: {
         projection: 'orthographic'
       }
     },
     series: [
       {
         type: 'surface',
         wireframe: {
           // show: false
         },
         data:
         [
         [0, 3, -8],[0, 3, -7], [0, 3, -6], [0, 3, -5], [0, 3, -4], [0, 3, -3], 
[0, 3, -2], [0, 3, -1],
         [15, 3, -8],[15, 3, -7],[15, 3, -6], [15, 3, -5], [15, 3, -4], [15, 3, 
-3], [15, 3, -2], [15, 3, -1],
         ]
       }
     ]
   };
   
   
   ### Current Behavior
   
   **This is the result I get:**
   
![image](https://github.com/apache/echarts/assets/157098535/1662151b-3e6a-46f4-921c-29f13303b17b)
   
   
   ### Expected Behavior
   
   **When I edit the data-series to:**
   
         [0, 3, -7], [0, 3, -6], [0, 3, -5], [0, 3, -4], [0, 3, -3], [0, 3, 
-2], [0, 3, -1],
         [15, 3, -7],[15, 3, -6], [15, 3, -5], [15, 3, -4], [15, 3, -3], [15, 
3, -2], [15, 3, -1],
   
   **I get a correct rectangular surface:**
   
   
![image](https://github.com/apache/echarts/assets/157098535/1c33d4c1-9495-4aab-856e-65444361af8b)
   
   **All I did was deleting the first data in each row:**
         [0, 3, -8],
         [15, 3, -8],
   
   ### Environment
   
   ```markdown
   You can reproduce the issue by pasting the code into the "examples" page on
   https://echarts.apache.org/
   ```
   
   
   ### Any additional comments?
   
   Is there any further documentation I overlooked?


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