How long have you been using them? Took me a bit on browns to get used to "reliably" actuating the keypress without bottoming out every time. If you give it enough force to feel the tactility, then it should register. As for holding the key down, you should release to feel the bump and then just press enough to feel it again. It isn't going to register on the release bump as you describe it, but rather on the bump when you press down.
Clears are the same for me. The bump is just a bit more noticeable.