I posted a new topic in our private category and I made it immediately unlisted.
After a few hours I see the topic received one like by a team-member and then a reply from another team-member.
The unlisted topics should not be visible only to administrators and moderators?
I think the problem here is that those members have the category as “watched” on their profiles.
Infact they “see” this unlisted topic when they opened the notifications tab clicking on their avatars.
I asked to another team-member to check his notifications and he hasn’t received it.
I checked his profile settings and I see he has no categories “watched”.
(tested on v1.8.0.beta13 +16)