Good morning campers.
The capsules breaking and they do not vibrate, it's happened a few times to me now and most concerning when it happens A full "post mortem" follows the event to make sure that the powder has actually been inhaled. I tripped over this problem in an old thread too so I know it happens to others.
Through a little trial and error I have discovered a way to avoid this. When piercing the capsule, with the two pins attached to the green button. Press in the green button as slowly as you can and then release normally.
I think the cause of this problem is that the two pins must go a little blunt through use.