Elk rendering of Diamond shape can have incorrect intersection calculations

[knsv]

Description

Steps to reproduce

---
config:
  layout: elk
---
flowchart LR
 subgraph s1["Untitled subgraph"]
        n1["Evaluate"]
        n2["Option 1"]
        n3["Option 2"]
        n4["fa:fa-car Option 3"]
  end
 subgraph s2["Untitled subgraph"]
        n5["Evaluate"]
        n6["Option 1"]
        n7["Option 2"]
        n8["fa:fa-car Option 3"]
  end
    A["Start"] -- Some text --> B("Continue")
    B --> C{"Evaluate"}
    C -- One --> D["Option 1"]
    C -- Two --> E["Option 2"]
    C -- Three --> F["fa:fa-car Option 3"]
    n1 -- One --> n2
    n1 -- Two --> n3
    n1 -- Three --> n4
    n5 -- One --> n6
    n5 -- Two --> n7
    n5 -- Three --> n8
    n1@{ shape: diam}
    n2@{ shape: rect}
    n3@{ shape: rect}
    n4@{ shape: rect}
    n5@{ shape: diam}
    n6@{ shape: rect}
    n7@{ shape: rect}
    n8@{ shape: rect}```

### Screenshots

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### Code Sample

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### Setup

- Mermaid version:
- Browser and Version: [Chrome, Edge, Firefox]

### Suggested Solutions

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### Additional Context

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