Steps to reproduce:

1. Open the attached project
2. Open the Test.texmkr graph asset
3. Left-Click and Hold on the Wire connected to the OutTexture port of one of the UniformNode
4. Drag the wire to disconnect it from the node
5. Release the wire and select Texture 2D Constant from the Node Library pop-up
6. Observe that the Wire was connected to the newly created constant Node
7. Undo the action
8. Observe the OutTexture port

Actual results: OutTexture port shows it is connected with a Wire, despite no Wire being present on screen. Creating a box selection window around the area where the Wire should be results in a Wire being picked up by the Inspector - showcasing that the connection exists, but isn't rendered

Expected results: After the Undo action is performed, the connecting Wire is restored to a state prior to Step 3

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