Hello. This issue similar to this one.

When one user comment your Album (in profile or group) or few users comment Album, system use the same language stream.

APP_GROUP_PHOTOS_NOTIFICATIONS_COMMENTED_ON_YOUR_PHOTO_ALBUM="%1$s posted a comment on your album, {b}%2$s{/b}"

APP_GROUP_PHOTOS_NOTIFICATIONS_COMMENTED_ON_YOUR_PHOTO_ALBUM="%1$s posted a comment on your album, {b}%2$s{/b}"

I beleave it should have PLURAL and SINGULAR mode like this:

APP_USER_PHOTOS_NOTIFICATIONS_LIKES_YOUR_ALBUMS_PLURAL="%1$s reacted to your photo album"
APP_USER_PHOTOS_NOTIFICATIONS_LIKES_YOUR_ALBUMS_SINGULAR="%1$s reacted to your photo album"

Thanks.