Double update ？ #512

Description with steps to reproduce

Add a qDebug() inside the setInData implementation of a NodeDelegateModel.

Trigger a data update from an upstream node.

Observe the console outputting the log twice with a small time gap (~40ms).

Supporting files, videos and screenshots

Hi author,
I noticed an interesting behavior where every node's setInData function is being called twice during execution. This leads to redundant computations for each update cycle. Is this a deliberate design choice for UI/Data synchronization, or should I be handling idempotency manually within the nodes?

Qt Version

QT 5

Operating system

Windows10

Additional context

No response

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