CSGPolygon3D in Path mode with collision enabled throws error: Node3D::get_global_transform: Condition "!is_inside_tree()" is true. Returning: Transform3D()

[Lippanon]

Godot version

f73cb4c

System information

Windows 10, Vulkan

Issue description

A CSGPolygon3D node with 'use_collision' on, in Path mode, with a path node assigned, throws the error "Node3D::get_global_transform: Condition "!is_inside_tree()" is true. Returning: Transform3D()" when running (and in some cases when switching scenes).

In this same MRP you can also see a different error, when switching between scenes in the editor, that I've mentioned in #58869, I can open a separate issue if needed:
I've opened a separate issue for this in #71750.

Steps to reproduce

Run the MRP. It's a simple Node3D scene with a CSGPolygon3D and Path3D as children.

Minimal reproduction project

transform bug.zip