Steps to reproduce:
1. Create a new graph in Unity.
2. Add 3 OnStart (no repeat) nodes, each connected to a log message node that logs "1", "2", and "3" respectively.
3. Run the graph in the scene and observe the log output (should be "1, 2, 3").
4. Reorder the OnStart nodes in the graph visually, moving the 3rd OnStart node (logging "3") to the leftmost position.
5. Toggle twice an OnStart repeat to force graph rebuild (because there is another bug where visually reordering nodes doesn't rebuild the graph automatically - BEHAVB-344).
6. Run the graph again.

Actual results:
The logged output remains "1, 2, 3" regardless of the visual reordering of OnStart nodes in the graph.

Expected results:
The logged output should follow the visual ordering of OnStart nodes in the graph (in this case, "3, 1, 2" after reordering).

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Reproducible with versions: 1.0.0/1.0.12