Lung Segmentation Problem with the level of details

I have a CT scan dataset and I am trying to segment the airways.
I am using Lung CT Segmenter module, with high details I get leaks, I decreased the level of details until reaching low details, where the airways are not appearing anymore (only lungs were segmented).
Anyone knowing the reason ? Even the trachea is not appearing at this level.
Tried to check the documentation for this module, but unfortunately only the whole code is available.
So the case is either I get leaks (high details down to medium low detail), or no airways at all (for low detail option).

The documentation including some video links are here: GitHub - Slicer/SlicerLungCTAnalyzer: This is a 3D Slicer extension for segmentation and spatial reconstruction of infiltrated, collapsed, and emphysematous areas in lung CT.

A recent paper describung th methods is herehttps://jtd.amegroups.org/article/view/83536/html

This is what I get with airway segmentation “medium/low” details in Slicer 5.8.1