Reproduction steps:
1. Open the attached “IN-114831” project
2. Open the “Behavior Graph” Asset in the Behavior Graph window
3. Select the “Repeat In Parallel” Node
4. Observe the Behavior Graph window’s Inspector

Expected result: {{BlackboardVariable<>}} is serialized and appears in the node Inspector
Actual result: On first creation, with empty story, {{BlackboardVariable<>}} fields do not serialize and are missing from the node Inspector

Reproducible with: 1.0.4, 1.0.12 (6000.0.59f1, 6000.2.7f1, 6000.3.0b4, 6000.4.0a1)

Reproducible on: Ubuntu 25.04, Windows 11
Not reproducible on: No other environments tested

Note:
- Workaround: Simply mentioned the variable in the node’s story, and it will be serialized. After that point, even when removed from the story, the variable stays visible in the node’s Inspector