track not required

I'm using fast-livo2 for some tests inside a building, but I'm getting a nasty trace that I don't know where it's coming from. I tried both with img_en=0 and =1. I'm attaching an image that I hope is clear.

<img width="893" height="629" alt="Image" src="https://github.com/user-attachments/assets/c9505a47-f1cc-41dd-8bd7-8018ce446f3b" />