Drafts locked from primary computer?

I’m getting a msg that the draft emails are locked when trying to view the draft emails on the primary computer from the Assistant computer. The Assistant name in the ACL on the primary computer is setup and mgr access. I’ve removed/added her to the ACL again on the primary computer, but the same thing happens? When the primary person is out of Notes, (Not drafts) the Assistant can work with the drafts and not recieve the lock msg?