Why is he not sharing work information?

A new supervisor has joined, one level above me.
When an executive assigns tasks via email, CCing all company employees,
he removes everyone below him from the CC list and only replies by CCing his own superiors..
Sometimes when I have to cover for someone, I don't receive the emails, so I have to scramble to catch up on the details immediately, which is very inconvenient.
I can't tell if he lacks self-confidence or if he thinks this is his own way of controlling information..