Reproduction steps:
1. Open the attached "IN-128856-REPRO" project
2. In the Project window, open "Behavior Graph"
3. Select the connection coming from "True" on a Conditional Branch
4. Try to delete the connection
5. Observe the result

Actual result: Connection remains intact
Expected result: Connection is removed

Reproducible with: 1.0.14 (6000.0.65f1, 6000.2.15f1, 6000.3.3f1, 6000.4.0b3, 6000.5.0a4)
Not reproducible with: 1.0.13 (6000.0.65f1, 6000.2.15f1, 6000.3.3f1, 6000.4.0b3, 6000.5.0a4)

Reproduced on: Windows 10 (Reporter), Windows 11
Not reproducible on: No other environments tested

Notes:
- The connection remains even after deleting its target node
- If you delete a Conditional Branch node while it is connected to anything, a console error “Did not find node UI for Unity.Behavior.GraphFramework.FloatingPortNodeModel” is thrown