Platform is slow, not loading properly. It also has a bug in counting the number of chats available.
Labels are not being registered with just one click, select the label more than once if necessary and make sure that the conversation has actually been marked. It is occurring in email and chat.
Chat conversations when assigned are slightly delayed, requiring you to repeat the process of assigning the conversation.
Emails in the unassigned area, when replied to, remain in this window, even though the entire process of tagging and replying has already been carried out.