A new property whose default name matches a category title never appears in the blackboard until the graph is reopened

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Visual Effect Graph package (com.unity.visualeffectgraph)
3. Create a new Visual Effect Graph (Assets > Create > Visual Effects > Visual Effect Graph)
4. Open the newly created Visual Effect Graph
5. Create a new Category named "New bool" by clicking the "+" button in the Blackboard
6. Create a new Bool property by clicking the "+" button in the Blackboard
7. Observe the Blackboard

Actual results: The new Bool property is not showing up

Expected results: The new Bool property is showing up

Reproducible with versions: 6000.0.0f1, 6000.0.83f1, 6000.3.24f1, 6000.5.11f1, 6000.6.1f1, 6000.7.0a6

Tested on (OS): Ubuntu 24.04, MacOS SIlicon Tahoe 26.6.2