first off, since this is my first post: Thanks for the great work!
In version 2.8.0.beta6, users, which are not moderators or administrators, cannot add new participants to private conversations anymore, independent of their trust level. They now only have an option to remove users.
As far as I understand from this older post, this should be the behavior for TL1 (but not for the TLs above).
Since I found nothing regarding this in the release notes, I suppose it is a bug. If not, it would be great if you could redirect me to a setting where I can enable this again. Thanks!