I've noticed it every now and then. I am running 2.2.2 on 2.2.3 servers (mostly). There are times when I launch the hook and it strikes a solid object, that it does not reel me in. I'm not touching the crouch key or any other keys, but I will be allowed to run all around and not be pulled in.
And another thing, is there any way so that the hook is not allowed to strike another player and become engaged at the point of impact. The other player is allowed to continue, and my hook is stuck in midair (or whereever i hit the other player). It just breaks my momentum. I'm more concerned about the first "feature" more than the second, though. Thanks!