We experience something that sounds similar. We have a great therapist. All the alters now trust him. Some times we will be talking about an issue/event that is specific to one particular alter or best known to one. That one will step forward to deal with it. Could be little one, older child, etc. Whoever was involved. Now we stay around so most hear the conversation & it is remembered by more than the involved alter. That wasn't always the case. Think it is a sign for us that we trust our therapist & that alters have worked thru their individual trauma & are accepted by the system. So a good 👍 thing!!