"Waiting for outlook.office.com" displayed most of the time. Outlook web app. Why?

What would cause this?

Displayed as status bar message, and covers the four app icons (email, calendar, contacts, tasks).

The browser Refresh X is displayed as though something is trying to load.  Pressing the Refresh does clear this.  Shouldn't things load on their own?  Using Chrome browser.  Never had any issues with the Outlook.com web app.