You can do that, or you can lager on the yeast cake for 3 or 4 weeks and be fine to bottle. And like Jonathan said, be slightly less careful racking to the bottling bucket. If you want to minimize the sediment, cold crash for a week then bottle. But as to your current lager, it might just need more time. If there was a hiss, it means it was working, just taking longer than normal since there was less yeast in suspension. Give it time if you can.