Performing Redo Create Node action can lead to Ghost Variable Node being created

Steps to reproduce:

1. Open the attached project
2. Open the RedoTest.texmkr graph asset
3. Create a MeanColorNode
4. Click and Drag the InTexture_1 Port
5. Select the "Create Variable (of port type)" option
6. Create a second MeanColorNode
7. Connect the created texture variable to the second MeanColorNode
8. Undo actions from steps 3 to 7 
9. Redo all of the actions
10. Observe the nodes created by the Redo operation

Actual results: Variable Node is recreated as a ghost node that is not rendered on screen, but can be selected and retains previously connected wires

Expected results: Nodes created by the Redo operation are identical to the ones prior to the Undo action. No errors or warnings are thrown.

Reproducible with versions: 6000.4.0b8, 6000.5.0a6

Can’t test with versions: 6000.0.67f1, 6000.3.7f1 (Graph Toolkit not available as a built-in module)

Tested on (OS): Windows 11, macOS 26.2

Notes:

• The issue occurs when Redo performs "Create Variable (of port type)" -> "Create Node" actions