When Grouped Nodes are converted to Subgraph Operator resulting Graph Node is not included in the Group

Steps to reproduce:

1. Open attached project
2. Open Test VFX graph
3. Select Grouped Add Nodes
4. Right-Click and select Convert to Subgraph Operator

Actual results: Newly created Subgraph Operator Node is not included in the Group 

Expected results: Newly created Subgraph Operator Node is included in the Group

Reproducible with versions: 2022.3.56f1, 6000.0.35f1, 6000.1.0b3

Tested on (OS): macOS 15.2

Notes:

• This issue isn't present in ShaderGraph