Outlook 2019 Closes when Xfinity email is selected (Windows 10)

Outlook 2019 works great for all of my Xfinity email that is NOT sent from Xfinity.  However, with emails SENT FROM Xfinity, Outlook 2019 will close by itself when I click on the email in the Outlook browser to view its contents.  It shows the contents for about 2 seconds, then closes.

This consistently happens with emails sent from Xfinity.  Otherwise Outlook 2019 works as intended in Windows 10.