Duke vents not being highlighted

No change in settings, was working perfectly and then only the vents stopped being highlighted. Turning it on and off shows duke getting highlighted/unhighlighted, but the vents remained off. 

<img width="2260" height="1066" alt="Image" src="https://github.com/user-attachments/assets/a4be519e-c3dc-46f2-b715-d3521cd9d673" />