When I've setup the updates area the notify has had to be each user listed out.
![KellieGardner_0-1705948214485.png KellieGardner_0-1705948214485.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/68914i21642AA926546393/image-size/medium?v=v2&px=400)
There is something causing it to run the update scenario multiple times - for each user instead of one comment with multiple users. Not sure if it's how you have your notify section setup but might need to look into how it works without the array and then see if there is something you can fix there.