### Godot version

4.0 Beta 10

### System information

Windows 10

### Issue description

when picking tiles from a gridmap and you have a search filter applied, it often doesn't do anything, instead I get an index out of bounds error in the console
`scene/gui/item_list.cpp:424 - Index p_current = 8 is out of bounds (items.size() = 4).`

### Steps to reproduce

1. Open a project using a gridmap like the platformer demo, or create one.
2. Search for specific tiles inside the tile selection.
3. Try to pick a tile inside the 3D viewport with that you want to paint (maybe you don't want to reset the filter and do a long search there)

In some cases it works, but mostly it doesn't work (depending on the tile you picked and what you searched for)
Also I am not sure, but I have the feeling that in a few cases it picks the wrong tile, instead of throwing an error

### Minimal reproduction project

Any project that uses a gridmap, for example the platformer demo from the demo projects repo
case NOTIFICATION_APPLICATION_FOCUS_OUT: {
			if (input_action == INPUT_PAINT) {
				
				Ref<InputEventMouseButton> release;
				release.instantiate();
				release->set_button_index(MouseButton::LEFT);
				forward_spatial_input_event(nullptr, release);
			}
		} break;
	}
}
void GridMapEditor::_update_cursor_instance() {
	if (!node) {
		return;
	}
	if (cursor_instance.is_valid()) {
		RenderingServer::get_singleton()->free(cursor_instance);
	}
	cursor_instance = RID();
	if (selected_palette >= 0) {
		if (node && !node->get_mesh_library().is_null()) {
			Ref<Mesh> mesh = node->get_mesh_library()->get_item_mesh(selected_palette);
			if (!mesh.is_null() && mesh->get_rid().is_valid()) {
				cursor_instance = RenderingServer::get_singleton()->instance_create2(mesh->get_rid(), get_tree()->get_root()->get_world_3d()->get_scenario());
				RenderingServer::get_singleton()->instance_set_transform(cursor_instance, cursor_transform);
			}
		}
	}
}
void GridMapEditor::_item_selected_cbk(int idx) {