Unable to draw a parent and child state machine using the Stately UI

[thiagomata]

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Description

The stately tool is unable to draw the parent and child machines when created with independent states.

Expected Result

Both machines visible in the UI

Actual Result

Only the child machine is drawn.

Reproduction

https://stately.ai/viz/21a8b712-f229-4d8d-a316-36c1577ac631

Additional context

creating a child state machine that sends and receives data from the parent machine.