It wouldn't surprise me if it's intentional. Once you deploy parachutes the capsule can drift a long way; waiting until the parachutes are stably deployed (whic

It wouldn't surprise me if it's intentional. Once you deploy parachutes the capsule can drift a long way; waiting until the parachutes are stably deployed (which they did) and then dropping the capsule is one way to make sure that it doesn't drift over land, and land on something unfortunate.