Ring Door View cam knock detection notification

Good evening, I've just had my first knock detection event on my view doorbell, it shows up in the history in the ring app but I was not notified like I am with door bell rings. My doorbell is currently off for motion alerts but person detection is on for 5 seconds + which works great. I would assume that knocking on my door would come out the same notification as ringing the doorbell so I'm a little confused on why I didn't get anything, but normal ring events are OK. Any help would be great Cheers