How to reproduce:
1. Open the attached project "VFXBug"
2. Open the "SampleScene" scene
3. Enter the Play Mode
4. Open the "New VFX" Asset
5. Make any change to the VFX Graph and press "Ctrl + S"/ "Command + S"
6. Observe the Console
Expected results: No warnings are thrown
Actual results: "The referenced script (Unknown) on this Behaviour is missing!" warning is thrown
Reproducible with: 6000.0.66f1, 6000.3.6f1, 6000.4.0b5, 6000.5.0a5
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested
Full warning: The referenced script (Unknown) on this Behaviour is missing!
UnityEditor.EditorApplication:Internal_CallGlobalEventHandler ()