GDScript 2.0: Inner class type declarations mismatched in outer scope

[lyuma]

Godot version:
4.0.dev 8e293ba

OS/device including version:
Windows 10.0.19041.804

Issue description:
I declared an inner class, which has a function returning a value of its own type or a supertype (sibling types are for some reason not in scope. Maybe related?)

Then, I declared a function in the containing .gd file which returns a value of the inner type. However, the two types are not compatible.

Script:

extends Reference
class InnerClass extends Reference:
	static func some_static_func() -> InnerClass:
		return new()

func create_inner_instance1() -> InnerClass:
	return InnerClass.some_static_func()

Error:

Cannot return value of type "GDScript" because the function return type is "InnerClass"

Steps to reproduce:

1. Open the example project.
2. Try to enable the "inner_class_decl" plugin.
3. It will give the above error at inner_classes.gd

Minimal reproduction project:
ImportedTypeDecl.zip

[vnen]

I think this is the same as #47063, which was fixed by #49105. At least I can't reproduce with the snippet in the post (the project is outdated given some renames and have some actual errors, so it's a bit difficult to test). I'll assume this is solve, as the mentioned error doesn't happen anymore.