[Bug]: Connection edges not visible when nodes are aligned vertically/horizontally (degenerate bounding box for gradient)

[crabouif]

Reproduction URL (StackBlitz, GitHub, etc.)

No response

Steps to Reproduce

1. Create a flow with layout with ~200 nodes and ~160 edges
2. Layout vertically or horizontally with dagre

Big tree:

Expected Behavior

The edge should always be visible, regardless of whether the connection path is vertical or horizontal.

Actual Behavior

The edge is not visible when nodes are fully aligned and so the edge is straight.

If the child node moved, then edge appear:

Browser

Chrome

[siarheihuzarevich]

Hi, thanks for opening this.

Could you please provide a minimal reproducible example (e.g. via StackBlitz, CodeSandbox, or GitHub Gist) that demonstrates this issue? Having a live reproduction will help to pinpoint whether the problem lies in the library or in the integration context.

Thank you!