### Godot version

4.0.3.stable

### System information

Windows 10/11

### Issue description

I want the player's cursor to change when highlighting pickable Area2Ds; to do this, I have the areas modify the `mouse_default_cursor_shape` property on an external Control when the mouse enters or exits. If another Control appears in front of the Area2D while the mouse is over it, there is a chance that the project will crash.

Nothing prints to the IDE's output on this crash. If running the editor with console, then
```
ERROR: Condition "slot >= slot_max" is true. Returning: nullptr
   at: get_instance (./core/object/object.h:972)
```
will sometimes appear alongside the crash. If it appears, it always appears twice.

When I run a debug build of the editor through WinDbg, WinDbg will catch the following exception:
```
(3b58.2aac): Access violation - code c0000005 (!!! second chance !!!)
godot_windows_editor_x86_64!ObjectDB::get_instance [inlined in godot_windows_editor_x86_64!Viewport::_cleanup_mouseover_colliders+0x6f]:
00007ff6`ac254a1f 488b5310        mov     rdx,qword ptr [rbx+10h] ds:cccccccc`c31c419b=????????????????
```
When using this method, the exception is not random; it always occurs on the first attempt.

### Steps to reproduce

- Open the minimal reproduction project in the editor.
- Run the project.
- Click on the Area2D (you'll want visible collision shapes on).
- A full-screen button will pop up. If the game does not crash at this point, clicking the button will hide it so you can try again. It should crash within a few seconds of mashing.

### Minimal reproduction project

[Crash Test.zip](https://github.com/godotengine/godot/files/12027772/Crash.Test.zip)

} else {
				last_id = physics_object_capture;
				last_object = capture_object;
			}
		}
		if (pos == last_pos) {
			if (last_id.is_valid()) {
				if (ObjectDB::get_instance(last_id) && last_object) {
					
					_collision_object_3d_input_event(last_object, camera_3d, ev, result.position, result.normal, result.shape);
					if (last_object->get_capture_input_on_drag() && mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && mb->is_pressed()) {
						physics_object_capture = last_id;
					}
				}
			}
		} else {
			if (camera_3d) {
				Vector3 from = camera_3d->project_ray_origin(pos);
				Vector3 dir = camera_3d->project_ray_normal(pos);
				real_t far = camera_3d->far;
				PhysicsDirectSpaceState3D *space = PhysicsServer3D::get_singleton()->space_get_direct_state(find_world_3d()->get_space());
				if (space) {
					PhysicsDirectSpaceState3D::RayParameters ray_params;
					ray_params.from = from;
					ray_params.to = from + dir * far;
					ray_params.collide_with_areas = true;
					ray_params.pick_ray = true;
					bool col = space->intersect_ray(ray_params, result);
					ObjectID new_collider;
					CollisionObject3D *co = col ? Object::cast_to<CollisionObject3D>(result.collider) : nullptr;