What does the "..." where the unread messages count usually is near the inbox mean?

Under my email address, there are the folders (Inbox, Sent, Drafts, Email Templates, etc.). Whenever I receive a new email, the notification displays to the right of “Inbox”. Where that notification # usually is, there are three dots (…) that don’t seem to go away. What does this mean? And is there something I need to adjust?

I think it means that folder isn’t synced, so it doesn’t know what the count is.

I was seeing that on the folder that was stuck and would never finish syncing, whereas the other folders showed accurate counts.

Hello Nichole,
sounds definitely as a synchronization issue.
Is there an error message in Tools>Operations>Error window?
If so, please copy it and the content of the Log tab.