1. Create new message -> add 2 users -> send message -> click on conversation title and add one more user from modal -> click `Back` and content should be present. (check if issue was solved)
2. A lot of other testing scenarios connected with searching for users (friend/non-friend), adding new user, creating threads, searching and at the same time creating threads with the same users on different account etc. to make sure this change don't modify any current logic.