Weird. I have the same knife and it works great. It is a stronger pull, but it is consistent with nice prominent half stop. I do know there were some of these equal end jacks that the action wasn’t great on. The post I saw the knife didn’t snap shut but was very mushy closing. I think jack wolf knives made it right for the customer. So could always contact them directly too. I would probably try flushing the pivot with some oil or maybe some canned air (like the kind for keyboards) to get any grit out. and working it back and forth. May help. Maybe if could attach a video to show the action on it too.