1) user1 react to your photo
2) user2 react to your photo
3) user3 react to your photo
Result: You get notification:
user3, user2 and user1 reacted to your photobut it display user1's avatar.
Expected result: notification should display user3's avatar like it works for other content type (albums, videos - I never seen such problem). Notification should display latest user who react to photo.
The same issue with commenting photo.
Example screenshot attached.