### Godot version

4.0.stable

### System information

Windows 10

### Issue description

In my project, we are rendering a GUI to a QuadMesh as an in-game interactive display. We push mouse click events when the player clicks the display. This worked fine during 4.0 beta, but after moving to the stable release the buttons on TreeItems stopped working. I put together a MRP and went back through the versions and it seems the issue started in RC1.

### Steps to reproduce

When running the MRP, it has a standard GUI on the left hand side of the screen and a QuadMesh rendered GUI on the right hand side. If you click the + button on an item, it will add another item to the list. On the QuadMesh you will see that you can highlight and collapse items in the list, but the + button does not function. If you run the MRP on 4.0.beta17 everything will function as expected.

### Minimal reproduction project

[TreeUI_through_SubViewport.zip](https://github.com/godotengine/godot/files/10959159/TreeUI_through_SubViewport.zip)

bool has_theme_font_override(const StringName &p_name) const;
	bool has_theme_font_size_override(const StringName &p_name) const;
	bool has_theme_color_override(const StringName &p_name) const;
	bool has_theme_constant_override(const StringName &p_name) const;
	bool has_theme_icon(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_stylebox(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_font(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_font_size(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_color(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	bool has_theme_constant(const StringName &p_name, const StringName &p_theme_type = StringName()) const;
	float get_theme_default_base_scale() const;
	Ref<Font> get_theme_default_font() const;
	int get_theme_default_font_size() const;
	
	virtual Transform2D get_final_transform() const override;
	virtual Transform2D get_screen_transform_internal(bool p_absolute_position = false) const override;
	virtual Transform2D get_popup_base_transform() const override;
	Rect2i get_parent_rect() const;
	virtual DisplayServer::WindowID get_window_id() const override;
	Window();
	~Window();
};
VARIANT_ENUM_CAST(Window::Mode);
VARIANT_ENUM_CAST(Window::Flags);
VARIANT_ENUM_CAST(Window::ContentScaleMode);
VARIANT_ENUM_CAST(Window::ContentScaleAspect);
VARIANT_ENUM_CAST(Window::LayoutDirection);
VARIANT_ENUM_CAST(Window::WindowInitialPosition);
#endif