### Godot version

f73cb4c13d1bc19b044fbef735522e3b0249e8ab

### 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).

![image](https://user-images.githubusercontent.com/115422160/211907313-20742234-4a1f-4d94-b573-544b8e1d07ca.png)

~~In this same MRP you can also see a different error, when switching between scenes in the editor, that I've mentioned in https://github.com/godotengine/godot/issues/58869, I can open a separate issue if needed:~~
I've opened a separate issue for this in https://github.com/godotengine/godot/issues/71750.
![image](https://user-images.githubusercontent.com/115422160/211907528-1df7230e-6270-4669-bf44-2ef449eebf1d.png)



### 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](https://github.com/godotengine/godot/files/10395682/transform.bug.zip)

if ((p_parent_removing || is_root_shape()) && !dirty) {
		call_deferred(SNAME("_update_shape")); 
	}
	if (!is_root_shape()) {
		parent_shape->_make_dirty();
	} else if (!dirty) {
		call_deferred(SNAME("_update_shape"));
	}
	dirty = true;
}
CSGBrush *CSGShape3D::_get_brush() {
	if (dirty) {
		if (brush) {
			memdelete(brush);
		}
		brush = nullptr;
		CSGBrush *n = _build_brush();
		for (int i = 0; i < get_child_count(); i++) {
			CSGShape3D *child = Object::cast_to<CSGShape3D>(get_child(i));
			if (!child) {
				continue;
			}
			if (!child->is_visible()) {
				continue;
			}
			CSGBrush *n2 = child->_get_brush();
			if (!n2) {
				continue;
			}