Tree Supports generating in mid air

[igiannakas]

Describe the bug
Tree supports generating in mid aid

3mf File for This Bug
3MF file can be found here: https://drive.google.com/file/d/1kAI4HKzYP2B18Y9GzfxTLOgutggixnc9/view?usp=share_link

To Reproduce
Slice model with Tree slim supports and the recommended settings

Expected behavior
No rogue extrusions happen

Screenshots

Printer model
Bambu Lab X1 carbon

Desktop (please complete the following information):

• OS: MacOS
• Version: 1.6.4 Beta 2

[igiannakas]

Also issue happening upstream with Bambu slicer. Fix appears to have been identified upstream: bambulab/BambuStudio#2115

[igiannakas]

I’ve created a PR for this as I’ve ported over the code change from Bambu studio as I needed this to work for a model I’m printing :) PR is above