Collapsing an empty VFX Subgraph Operator with contextual menu removes the arrow

How to reproduce:
1. Open the attached "VFXRepro" project
2. Open the "New VFX"
3. Navigate to the "New VFX_2 Subgraph Operator" Node
4. Right-click on the Node -> Collapse Operators
5. Observe the results

Expected results: The Node is slightly smaller and the arrow to expand the Node is visible
Actual results: The Node becomes smaller and the arrow to expand the Node is gone

Reproducible with: 6000.0.55f1, 6000.1.16f1, 6000.2.0f1, 6000.3.0a4

Reproducible on: macOS Sequoia 15.5 (M1)
Not reproducible on: No other environment tested