Combined inbox not working

I am sitting looking at a newly installed em Client.  Installed a day ago.   I have no unread emails in one account and 2 unread emails in the other.  The combined inbox says there are 2 unread emails - yet in the next panel from the left-  it says there are no messages to show in this view.

My inbox has just updated and has 4 unread in one inbox, 1 unread in the other. The smart folders all inboxes area says there is only 1 unread email - and sorted by received column still says there are no messages…

Clearly something is very wrong -  Windows 10.