There are few days since I've received no daily digest from my group, without changing the setup. Why?

There are few days since I've received no dayly digest from my group, without changing the setup. There were new things on the group, like new members, new photos. I mention that the owner of the group made me moderator of the group few days before. Is there any connection with the fact that I don't receive the daily digest? Anyway can you tell me why I don't receive it?