'Ghost' To Do Task Visible in Counter of 'All' - But Nowhere Else - Unable to View 'All'

I have an interesting case in Classic Outlook (Version 2511).  There is an extra item in the 'All' counter in To Do that is only visible in one instance of Outlook.  If I use Outlook on the web or the To Do app itself - all tasks and counts are accurate.  Even the Planner app in Teams shows the correct tasks and number of them.  In my Outlook Classic at home it works properly and displays the number of tasks correctly.

But not in my Outlook Classic at work.

In fact - if you try to click on the 'All' itself - the display simply blanks out and you have to close and re-open Outlook to get To Do to open again.

I've tried the obvious already.  Thinking because it only happens in Outlook Classic at work - I've already completely wiped my ost file and rebuilt it from scratch.  I've started outlook with various 'clean' flags.  None of them have been able to clear the phantom count that will crash To Do from within classic Outlook.

What is being overlooked?  As you can see below - the number of 'All' is always one more than what it should be.